🔩 Moisture sensor bar corrosion Repair Guide for GE GFD45ESSMWW
💡 Don’t panic! Moisture sensor bar corrosion on your GE GFD45ESSMWW dryer is a common issue that many DIY enthusiasts successfully repair. This comprehensive guide will walk you through each step with detailed explanations to help you diagnose and fix the problem safely and effectively. 🎉 You’ve got this!
🔧 Required Tools & Parts
- Moisture sensor bars
- Rubbing alcohol
- Fine sandpaper
📝 Pro Tip: Gather all your tools and parts before starting. This saves time and prevents frustration mid-repair. Most of these parts can be found online or at appliance parts stores. Make sure you have the correct model number when ordering parts! ✔️ Double-check compatibility before purchasing.
⚠️ Safety First!
⚠️ Always disconnect power before working on your dryer. Electrical safety is non-negotiable. If you’re working with gas dryers, also shut off the gas supply. If you’re unsure about any step, consult a professional technician. Your safety is more important than saving a few dollars! ⚠️ When in doubt, call a pro!
✔️ Step-by-Step Repair Instructions
🔌
🔧 Step 1: Unplug dryer and remove front panel
- Locate the power cord at the back of the dryer where it connects to the wall outlet (typically 240V, either 3-prong or 4-prong configuration).
- Grasp the plug body (not the cord) and pull straight out from the wall outlet until completely disconnected.
- Move the plug away from the outlet and position it on top of the dryer or on the floor at least 3 feet away from the work area.
- Open the dryer door fully (180 degrees) to access the interior.
- Locate the 2 Phillips-head screws inside the door opening, positioned on the front panel lip approximately 2 inches down from the top edge—one on the left side and one on the right side.
- Using a Phillips-head #2 screwdriver, remove both screws by turning counterclockwise and set them aside in a container.
- Close the dryer door.
- Locate the lint filter housing at the top front of the dryer and remove the lint screen completely.
- Look inside the lint filter opening and identify 2 Phillips-head screws—one on the left side and one on the right side, approximately 3 inches deep into the opening.
- Remove both screws using your Phillips-head #2 screwdriver and place them with the other screws.
- Grip the front panel along the top edge with both hands, positioned approximately 8-10 inches from each side.
- Lift the panel upward approximately 1 inch to disengage the bottom clips (2 clips located at the bottom corners).
- Pull the panel forward and away from the dryer cabinet, pivoting it slightly if needed to clear any remaining engagement points.
- Set the front panel aside in a safe location where it won’t be damaged, positioning it face-up on a clean, flat surface.
🔍
🛠️ Step 2: Locate moisture sensor bars
- Open the dryer door completely and prop it open to maintain full access to the drum interior.
- Look at the back wall of the drum (the wall opposite the door opening) approximately 8-10 inches from the top rim.
- Identify two parallel metal strips running vertically, each approximately 3 inches long and 1/4 inch wide, spaced roughly 2-3 inches apart from each other.
- These sensor bars appear as thin, polished metal strips that are slightly raised (approximately 1/16 inch) from the white or gray drum surface.
- Run your finger along each strip—they will feel smooth and metallic, distinctly different from the surrounding painted drum surface.
- Trace the sensor bars downward to where they connect to the drum wall—you’ll notice they extend through small slots in the drum surface.
- Note that on this GE model, the left sensor bar is positioned approximately 4 inches from the left edge of the drum back wall, and the right sensor bar is approximately 4 inches from the right edge.
- Examine the area behind these bars by rotating the drum slightly and shining a flashlight through the drum perforations—you’ll see wire connections feeding through the back panel.
- Verify you’ve located the correct components by checking that both bars are identical in size, parallel to each other, and positioned symmetrically on the drum’s back wall.
- The sensor bars should have a silver or stainless steel appearance and may show some mineral deposits or lint buildup on their surface, which appears as white residue or fuzzy accumulation.
🔍
⚙️ Step 3: Inspect for corrosion
- Direct your flashlight at the drum support rollers located at the rear of the dryer cabinet, approximately 18 inches from the floor on both the left and right sides.
- Examine the roller shafts for white, green, or orange crusty deposits indicating corrosion – these shafts are cylindrical metal rods approximately 0.5 inches in diameter extending through the roller centers.
- Run your finger along each shaft surface (the metal should feel smooth, not rough or pitted) and check if any flaky material comes off on your fingertip.
- Move to the idler pulley arm located at the bottom front of the drum, 8 inches from the right side panel – look for rust spots or discoloration on the spring and pivot point where the arm connects to the base.
- Inspect the metal base plate beneath the drum for rust patches, particularly in the 6-inch radius around the blower wheel housing on the left side.
- Check all visible wire terminals and connectors for green or white corrosion buildup – pay special attention to the thermal fuse terminals located on the blower housing and the door switch wires at the front right corner.
- Examine the drum support bearing at the rear center (a white or gray plastic piece approximately 2 inches in diameter) for brown rust stains bleeding from the metal shaft center.
- If you find light surface corrosion on metal components, spray WD-40 directly onto affected areas and wipe with a clean cloth until the metal appears silver again.
- If corrosion has created pits deeper than 1/16 inch (roughly the thickness of a penny) or if bearing surfaces feel rough when rotated by hand, mark these components for replacement.
- Verify all electrical terminals are clean and shiny – corroded terminals appear dull green or white instead of bright brass or silver colored metal.
🧹
🔩 Step 4: Clean with rubbing alcohol
- Pour 91% isopropyl rubbing alcohol into a small container or bowl (approximately 1/4 cup).
- Dip a clean, lint-free microfiber cloth into the alcohol until damp but not dripping.
- Locate the moisture sensor bars inside the drum – these are two parallel metal strips running vertically on the back interior wall, positioned approximately 8 inches from the top of the drum and spaced 3 inches apart.
- Wipe each sensor bar firmly from top to bottom using straight vertical strokes, applying moderate pressure for 5-6 passes per bar.
- Fold the cloth to expose a clean section and wipe each sensor bar horizontally across its width (approximately 1 inch wide) using 3-4 passes to remove any residual film.
- Inspect the sensor bars under good lighting – they should appear shiny and metallic silver with no visible white residue, soap film, or fabric softener buildup.
- Clean the drum interior walls where laundry makes contact by wiping in circular motions, covering the entire surface area including the front, back, and sides.
- Dampen a fresh section of the cloth with alcohol and wipe the rubber door seal, pulling back the folds to access hidden areas where detergent and lint accumulate.
- Clean the lint filter housing opening (located in the front lower door area) by wiping around the rectangular opening where the filter inserts.
- Allow all cleaned surfaces to air dry for 3-4 minutes – the alcohol will evaporate completely, leaving no moisture behind.
- Run your finger along each sensor bar to verify the surface feels smooth and clean with no sticky or rough texture.
- The sensors are now free of buildup and ready for proper moisture detection during drying cycles.
🔧
đź“‹ Step 5: If corroded, sand lightly with fine sandpaper
- Locate the wire terminal connections you identified in the previous step – these are the metal contact points where wires attach to the heating element terminals at the rear of the drum opening.
- Examine each terminal for green, white, or crusty brown buildup, which indicates corrosion that prevents proper electrical contact.
- Unplug each wire connector from its terminal by gripping the plastic connector housing (not the wire) and pulling straight off with 5-10 pounds of force.
- Obtain 220-grit fine sandpaper and tear off a 2-inch by 2-inch piece for handling.
- Fold the sandpaper piece in half with the grit facing outward to create a sanding pad.
- Sand the exposed male terminal blade by wrapping the sandpaper around it and moving back and forth 8-10 strokes with light pressure (approximately 2-3 pounds of force).
- Rotate the terminal 90 degrees and repeat the sanding motion for another 8-10 strokes to clean all surfaces.
- Inspect the terminal – it should now show bare, shiny silver-colored metal with no discoloration.
- Insert the sandpaper into the female wire connector socket and twist 3-4 full rotations clockwise, then counterclockwise, to clean the internal contact surfaces.
- Blow forcefully into the wire connector to expel any metal dust or debris from the sanding process.
- Wipe the male terminal with a clean, dry cloth to remove remaining residue.
- Repeat steps 6-11 for each corroded terminal connection – the GFD45ESSMWW dryer has 2 heating element terminals that commonly corrode.
- Verify success by observing bright, clean metal surfaces on both male terminals and no visible corrosion inside the female connectors when held up to light.
🧪
âś… Step 6: Test sensor resistance
- Locate your multimeter and rotate the dial to the resistance (Ω) setting, specifically to the 200K ohm range.
- Touch the two multimeter probes together and verify the reading shows 0 ohms or near-zero, confirming the meter is functioning correctly.
- Identify the moisture sensor, which consists of two metal strips located on the back wall of the drum, positioned approximately 3 inches from the right edge and 8 inches down from the top rim.
- Examine the sensor’s wire harness connector, a white plastic connector with 2 wires (typically white and brown), located directly behind the sensor on the exterior of the drum housing.
- Touch one multimeter probe to the left metal strip of the sensor and the other probe to the right metal strip.
- Read the resistance value on the multimeter display. The sensor should show between 40,000 and 60,000 ohms (40K-60K) at room temperature when dry.
- Write down the resistance reading for reference.
- Dampen a clean cloth with plain water and wipe both metal sensor strips thoroughly.
- Immediately retest the resistance by placing the multimeter probes on the wet sensor strips.
- Observe the resistance reading drop to between 500 and 5,000 ohms when wet.
- If the dry reading shows infinite resistance (display shows “OL” or “1”) or zero ohms, the sensor has failed and requires replacement (part number WE04X25039).
- If the wet reading does not drop below 10,000 ohms, mineral buildup is preventing conductivity; proceed to cleaning, or if reading remains infinite, the sensor has failed.
- Dry the sensor strips completely with a clean, lint-free cloth and verify the reading returns to the 40K-60K range.
âś…
🔍 Step 7: If sensor doesn’t respond, replace
- Order replacement defrost sensor part number WR55X10025 or compatible equivalent for the GE GFD45ESSMWW.
- Verify you have the correct sensor by comparing the new part’s white plastic terminal block and wire lead length (approximately 12 inches) to the existing sensor still mounted in the freezer.
- Unplug the refrigerator from the wall outlet.
- Locate the defrost sensor wire connector inside the refrigerator compartment behind the rear panel where you previously tested it—a white 2-pin connector approximately 8 inches down from the top of the compartment, 4 inches from the right side.
- Squeeze the plastic tab on the connector and pull the two halves apart to disconnect the sensor from the main wiring harness.
- Trace the sensor wire down to where the sensor body attaches to the evaporator coil tubing in the center of the coil assembly.
- Use needle-nose pliers to spread open the spring clip securing the sensor to the copper tubing—pull the clip ends outward approximately 1/4 inch until the clip releases.
- Slide the old sensor and its rubber grommet off the evaporator tube.
- Slide the rubber grommet from the new sensor onto the evaporator tube at the same location where the old sensor was positioned.
- Position the new sensor’s metal probe directly against the copper tubing surface.
- Compress the spring clip with needle-nose pliers and slide it over the sensor body until it snaps into the groove, securing the sensor firmly against the tube—you should feel resistance when trying to rotate the sensor.
- Route the sensor wire along the same path as the original, using existing clips to secure it.
- Connect the white 2-pin connector to the main harness—push together until you hear and feel a distinct click indicating full seating.
- Plug the refrigerator back into the wall outlet.
âś…
đź’ˇ Step 8: Install new sensor bars if needed
- Remove the new sensor bar assembly from its packaging and identify the two separate bars – one for the left side (approximately 18 inches long) and one for the right side (matching length).
- Locate the wire harness connector attached to each new sensor bar – this is a white rectangular plug measuring roughly 1 inch wide with 2 metal pins visible inside.
- Starting with the right sensor bar, position it along the right interior door edge where the old sensor was located, with the infrared emitter (small clear plastic window) facing toward the left side of the door.
- Align the two mounting holes on the sensor bar bracket with the threaded holes in the door frame, spaced 14 inches apart vertically from top to bottom hole.
- Insert the upper mounting screw first and hand-tighten using a Phillips-head screwdriver #2, leaving it slightly loose for final adjustment.
- Insert the lower mounting screw and hand-tighten, then verify the sensor bar sits flush against the door edge with no gaps.
- Tighten both screws firmly, turning each 3-4 full rotations until the bracket no longer moves when pressed.
- Route the sensor wire along the door channel toward the bottom right corner where the control board connector is located, tucking the wire into the existing wire clips spaced every 6 inches.
- Repeat steps 3-8 for the left sensor bar, positioning it on the left interior door edge with the infrared receiver window facing right.
- Push each white wire connector onto its corresponding control board terminal until you hear and feel a distinct click – the connector should be fully seated with no gap between the plug body and the terminal housing.
- Verify both sensor bars are aligned horizontally across from each other at matching heights, with the infrared windows directly facing each other.
🧪
⚡ Step 9: Test moisture detection
- Open the dryer door and locate the two metal moisture sensor bars on the inside of the drum, positioned horizontally 3 inches from the front rim at the 4 o’clock and 8 o’clock positions.
- Dampen a clean cotton towel with water until it feels wet to the touch but not dripping.
- Place the damp towel flat against the drum surface, ensuring it contacts both moisture sensor bars simultaneously.
- Close the dryer door firmly until you hear the latch click.
- Press the Power button once to activate the control panel—the display will illuminate.
- Turn the cycle selector knob clockwise to the “Sensor Dry – Normal” setting.
- Press the Start button once—the dryer drum will begin rotating, and you will hear the blower motor activate within 3-5 seconds.
- Watch the estimated time remaining on the digital display—it should show approximately 35-45 minutes for the damp towel load.
- Allow the dryer to run for 5 minutes while listening for consistent drum rotation and airflow from the rear exhaust vent.
- Open the door mid-cycle—the dryer will stop automatically within 2 seconds, and the display will show “Door Open” or pause the countdown.
- Feel the towel for warmth—it should be noticeably warm to the touch, indicating proper heating element function.
- Close the door and press Start again—the cycle will resume from where it paused, and the timer will continue counting down.
- Let the cycle complete fully—when the moisture sensors detect the towel is dry, the dryer will automatically shut off, emit 3 short beeps, and display “Cycle Complete.”
- Open the door and verify the towel is completely dry with no damp spots.
- Turn the cycle selector to the Off position and close the door—your moisture sensor system is functioning correctly.
đź›’ Recommended Products
🛠️ Step 2: Locate moisture sensor bars
- Open the dryer door completely and prop it open to maintain full access to the drum interior.
- Look at the back wall of the drum (the wall opposite the door opening) approximately 8-10 inches from the top rim.
- Identify two parallel metal strips running vertically, each approximately 3 inches long and 1/4 inch wide, spaced roughly 2-3 inches apart from each other.
- These sensor bars appear as thin, polished metal strips that are slightly raised (approximately 1/16 inch) from the white or gray drum surface.
- Run your finger along each strip—they will feel smooth and metallic, distinctly different from the surrounding painted drum surface.
- Trace the sensor bars downward to where they connect to the drum wall—you’ll notice they extend through small slots in the drum surface.
- Note that on this GE model, the left sensor bar is positioned approximately 4 inches from the left edge of the drum back wall, and the right sensor bar is approximately 4 inches from the right edge.
- Examine the area behind these bars by rotating the drum slightly and shining a flashlight through the drum perforations—you’ll see wire connections feeding through the back panel.
- Verify you’ve located the correct components by checking that both bars are identical in size, parallel to each other, and positioned symmetrically on the drum’s back wall.
- The sensor bars should have a silver or stainless steel appearance and may show some mineral deposits or lint buildup on their surface, which appears as white residue or fuzzy accumulation.
🔍
⚙️ Step 3: Inspect for corrosion
- Direct your flashlight at the drum support rollers located at the rear of the dryer cabinet, approximately 18 inches from the floor on both the left and right sides.
- Examine the roller shafts for white, green, or orange crusty deposits indicating corrosion – these shafts are cylindrical metal rods approximately 0.5 inches in diameter extending through the roller centers.
- Run your finger along each shaft surface (the metal should feel smooth, not rough or pitted) and check if any flaky material comes off on your fingertip.
- Move to the idler pulley arm located at the bottom front of the drum, 8 inches from the right side panel – look for rust spots or discoloration on the spring and pivot point where the arm connects to the base.
- Inspect the metal base plate beneath the drum for rust patches, particularly in the 6-inch radius around the blower wheel housing on the left side.
- Check all visible wire terminals and connectors for green or white corrosion buildup – pay special attention to the thermal fuse terminals located on the blower housing and the door switch wires at the front right corner.
- Examine the drum support bearing at the rear center (a white or gray plastic piece approximately 2 inches in diameter) for brown rust stains bleeding from the metal shaft center.
- If you find light surface corrosion on metal components, spray WD-40 directly onto affected areas and wipe with a clean cloth until the metal appears silver again.
- If corrosion has created pits deeper than 1/16 inch (roughly the thickness of a penny) or if bearing surfaces feel rough when rotated by hand, mark these components for replacement.
- Verify all electrical terminals are clean and shiny – corroded terminals appear dull green or white instead of bright brass or silver colored metal.
🧹
🔩 Step 4: Clean with rubbing alcohol
- Pour 91% isopropyl rubbing alcohol into a small container or bowl (approximately 1/4 cup).
- Dip a clean, lint-free microfiber cloth into the alcohol until damp but not dripping.
- Locate the moisture sensor bars inside the drum – these are two parallel metal strips running vertically on the back interior wall, positioned approximately 8 inches from the top of the drum and spaced 3 inches apart.
- Wipe each sensor bar firmly from top to bottom using straight vertical strokes, applying moderate pressure for 5-6 passes per bar.
- Fold the cloth to expose a clean section and wipe each sensor bar horizontally across its width (approximately 1 inch wide) using 3-4 passes to remove any residual film.
- Inspect the sensor bars under good lighting – they should appear shiny and metallic silver with no visible white residue, soap film, or fabric softener buildup.
- Clean the drum interior walls where laundry makes contact by wiping in circular motions, covering the entire surface area including the front, back, and sides.
- Dampen a fresh section of the cloth with alcohol and wipe the rubber door seal, pulling back the folds to access hidden areas where detergent and lint accumulate.
- Clean the lint filter housing opening (located in the front lower door area) by wiping around the rectangular opening where the filter inserts.
- Allow all cleaned surfaces to air dry for 3-4 minutes – the alcohol will evaporate completely, leaving no moisture behind.
- Run your finger along each sensor bar to verify the surface feels smooth and clean with no sticky or rough texture.
- The sensors are now free of buildup and ready for proper moisture detection during drying cycles.
🔧
đź“‹ Step 5: If corroded, sand lightly with fine sandpaper
- Locate the wire terminal connections you identified in the previous step – these are the metal contact points where wires attach to the heating element terminals at the rear of the drum opening.
- Examine each terminal for green, white, or crusty brown buildup, which indicates corrosion that prevents proper electrical contact.
- Unplug each wire connector from its terminal by gripping the plastic connector housing (not the wire) and pulling straight off with 5-10 pounds of force.
- Obtain 220-grit fine sandpaper and tear off a 2-inch by 2-inch piece for handling.
- Fold the sandpaper piece in half with the grit facing outward to create a sanding pad.
- Sand the exposed male terminal blade by wrapping the sandpaper around it and moving back and forth 8-10 strokes with light pressure (approximately 2-3 pounds of force).
- Rotate the terminal 90 degrees and repeat the sanding motion for another 8-10 strokes to clean all surfaces.
- Inspect the terminal – it should now show bare, shiny silver-colored metal with no discoloration.
- Insert the sandpaper into the female wire connector socket and twist 3-4 full rotations clockwise, then counterclockwise, to clean the internal contact surfaces.
- Blow forcefully into the wire connector to expel any metal dust or debris from the sanding process.
- Wipe the male terminal with a clean, dry cloth to remove remaining residue.
- Repeat steps 6-11 for each corroded terminal connection – the GFD45ESSMWW dryer has 2 heating element terminals that commonly corrode.
- Verify success by observing bright, clean metal surfaces on both male terminals and no visible corrosion inside the female connectors when held up to light.
🧪
âś… Step 6: Test sensor resistance
- Locate your multimeter and rotate the dial to the resistance (Ω) setting, specifically to the 200K ohm range.
- Touch the two multimeter probes together and verify the reading shows 0 ohms or near-zero, confirming the meter is functioning correctly.
- Identify the moisture sensor, which consists of two metal strips located on the back wall of the drum, positioned approximately 3 inches from the right edge and 8 inches down from the top rim.
- Examine the sensor’s wire harness connector, a white plastic connector with 2 wires (typically white and brown), located directly behind the sensor on the exterior of the drum housing.
- Touch one multimeter probe to the left metal strip of the sensor and the other probe to the right metal strip.
- Read the resistance value on the multimeter display. The sensor should show between 40,000 and 60,000 ohms (40K-60K) at room temperature when dry.
- Write down the resistance reading for reference.
- Dampen a clean cloth with plain water and wipe both metal sensor strips thoroughly.
- Immediately retest the resistance by placing the multimeter probes on the wet sensor strips.
- Observe the resistance reading drop to between 500 and 5,000 ohms when wet.
- If the dry reading shows infinite resistance (display shows “OL” or “1”) or zero ohms, the sensor has failed and requires replacement (part number WE04X25039).
- If the wet reading does not drop below 10,000 ohms, mineral buildup is preventing conductivity; proceed to cleaning, or if reading remains infinite, the sensor has failed.
- Dry the sensor strips completely with a clean, lint-free cloth and verify the reading returns to the 40K-60K range.
âś…
🔍 Step 7: If sensor doesn’t respond, replace
- Order replacement defrost sensor part number WR55X10025 or compatible equivalent for the GE GFD45ESSMWW.
- Verify you have the correct sensor by comparing the new part’s white plastic terminal block and wire lead length (approximately 12 inches) to the existing sensor still mounted in the freezer.
- Unplug the refrigerator from the wall outlet.
- Locate the defrost sensor wire connector inside the refrigerator compartment behind the rear panel where you previously tested it—a white 2-pin connector approximately 8 inches down from the top of the compartment, 4 inches from the right side.
- Squeeze the plastic tab on the connector and pull the two halves apart to disconnect the sensor from the main wiring harness.
- Trace the sensor wire down to where the sensor body attaches to the evaporator coil tubing in the center of the coil assembly.
- Use needle-nose pliers to spread open the spring clip securing the sensor to the copper tubing—pull the clip ends outward approximately 1/4 inch until the clip releases.
- Slide the old sensor and its rubber grommet off the evaporator tube.
- Slide the rubber grommet from the new sensor onto the evaporator tube at the same location where the old sensor was positioned.
- Position the new sensor’s metal probe directly against the copper tubing surface.
- Compress the spring clip with needle-nose pliers and slide it over the sensor body until it snaps into the groove, securing the sensor firmly against the tube—you should feel resistance when trying to rotate the sensor.
- Route the sensor wire along the same path as the original, using existing clips to secure it.
- Connect the white 2-pin connector to the main harness—push together until you hear and feel a distinct click indicating full seating.
- Plug the refrigerator back into the wall outlet.
âś…
đź’ˇ Step 8: Install new sensor bars if needed
- Remove the new sensor bar assembly from its packaging and identify the two separate bars – one for the left side (approximately 18 inches long) and one for the right side (matching length).
- Locate the wire harness connector attached to each new sensor bar – this is a white rectangular plug measuring roughly 1 inch wide with 2 metal pins visible inside.
- Starting with the right sensor bar, position it along the right interior door edge where the old sensor was located, with the infrared emitter (small clear plastic window) facing toward the left side of the door.
- Align the two mounting holes on the sensor bar bracket with the threaded holes in the door frame, spaced 14 inches apart vertically from top to bottom hole.
- Insert the upper mounting screw first and hand-tighten using a Phillips-head screwdriver #2, leaving it slightly loose for final adjustment.
- Insert the lower mounting screw and hand-tighten, then verify the sensor bar sits flush against the door edge with no gaps.
- Tighten both screws firmly, turning each 3-4 full rotations until the bracket no longer moves when pressed.
- Route the sensor wire along the door channel toward the bottom right corner where the control board connector is located, tucking the wire into the existing wire clips spaced every 6 inches.
- Repeat steps 3-8 for the left sensor bar, positioning it on the left interior door edge with the infrared receiver window facing right.
- Push each white wire connector onto its corresponding control board terminal until you hear and feel a distinct click – the connector should be fully seated with no gap between the plug body and the terminal housing.
- Verify both sensor bars are aligned horizontally across from each other at matching heights, with the infrared windows directly facing each other.
🧪
⚡ Step 9: Test moisture detection
- Open the dryer door and locate the two metal moisture sensor bars on the inside of the drum, positioned horizontally 3 inches from the front rim at the 4 o’clock and 8 o’clock positions.
- Dampen a clean cotton towel with water until it feels wet to the touch but not dripping.
- Place the damp towel flat against the drum surface, ensuring it contacts both moisture sensor bars simultaneously.
- Close the dryer door firmly until you hear the latch click.
- Press the Power button once to activate the control panel—the display will illuminate.
- Turn the cycle selector knob clockwise to the “Sensor Dry – Normal” setting.
- Press the Start button once—the dryer drum will begin rotating, and you will hear the blower motor activate within 3-5 seconds.
- Watch the estimated time remaining on the digital display—it should show approximately 35-45 minutes for the damp towel load.
- Allow the dryer to run for 5 minutes while listening for consistent drum rotation and airflow from the rear exhaust vent.
- Open the door mid-cycle—the dryer will stop automatically within 2 seconds, and the display will show “Door Open” or pause the countdown.
- Feel the towel for warmth—it should be noticeably warm to the touch, indicating proper heating element function.
- Close the door and press Start again—the cycle will resume from where it paused, and the timer will continue counting down.
- Let the cycle complete fully—when the moisture sensors detect the towel is dry, the dryer will automatically shut off, emit 3 short beeps, and display “Cycle Complete.”
- Open the door and verify the towel is completely dry with no damp spots.
- Turn the cycle selector to the Off position and close the door—your moisture sensor system is functioning correctly.
đź›’ Recommended Products
🔩 Step 4: Clean with rubbing alcohol
- Pour 91% isopropyl rubbing alcohol into a small container or bowl (approximately 1/4 cup).
- Dip a clean, lint-free microfiber cloth into the alcohol until damp but not dripping.
- Locate the moisture sensor bars inside the drum – these are two parallel metal strips running vertically on the back interior wall, positioned approximately 8 inches from the top of the drum and spaced 3 inches apart.
- Wipe each sensor bar firmly from top to bottom using straight vertical strokes, applying moderate pressure for 5-6 passes per bar.
- Fold the cloth to expose a clean section and wipe each sensor bar horizontally across its width (approximately 1 inch wide) using 3-4 passes to remove any residual film.
- Inspect the sensor bars under good lighting – they should appear shiny and metallic silver with no visible white residue, soap film, or fabric softener buildup.
- Clean the drum interior walls where laundry makes contact by wiping in circular motions, covering the entire surface area including the front, back, and sides.
- Dampen a fresh section of the cloth with alcohol and wipe the rubber door seal, pulling back the folds to access hidden areas where detergent and lint accumulate.
- Clean the lint filter housing opening (located in the front lower door area) by wiping around the rectangular opening where the filter inserts.
- Allow all cleaned surfaces to air dry for 3-4 minutes – the alcohol will evaporate completely, leaving no moisture behind.
- Run your finger along each sensor bar to verify the surface feels smooth and clean with no sticky or rough texture.
- The sensors are now free of buildup and ready for proper moisture detection during drying cycles.
🔧
đź“‹ Step 5: If corroded, sand lightly with fine sandpaper
- Locate the wire terminal connections you identified in the previous step – these are the metal contact points where wires attach to the heating element terminals at the rear of the drum opening.
- Examine each terminal for green, white, or crusty brown buildup, which indicates corrosion that prevents proper electrical contact.
- Unplug each wire connector from its terminal by gripping the plastic connector housing (not the wire) and pulling straight off with 5-10 pounds of force.
- Obtain 220-grit fine sandpaper and tear off a 2-inch by 2-inch piece for handling.
- Fold the sandpaper piece in half with the grit facing outward to create a sanding pad.
- Sand the exposed male terminal blade by wrapping the sandpaper around it and moving back and forth 8-10 strokes with light pressure (approximately 2-3 pounds of force).
- Rotate the terminal 90 degrees and repeat the sanding motion for another 8-10 strokes to clean all surfaces.
- Inspect the terminal – it should now show bare, shiny silver-colored metal with no discoloration.
- Insert the sandpaper into the female wire connector socket and twist 3-4 full rotations clockwise, then counterclockwise, to clean the internal contact surfaces.
- Blow forcefully into the wire connector to expel any metal dust or debris from the sanding process.
- Wipe the male terminal with a clean, dry cloth to remove remaining residue.
- Repeat steps 6-11 for each corroded terminal connection – the GFD45ESSMWW dryer has 2 heating element terminals that commonly corrode.
- Verify success by observing bright, clean metal surfaces on both male terminals and no visible corrosion inside the female connectors when held up to light.
🧪
âś… Step 6: Test sensor resistance
- Locate your multimeter and rotate the dial to the resistance (Ω) setting, specifically to the 200K ohm range.
- Touch the two multimeter probes together and verify the reading shows 0 ohms or near-zero, confirming the meter is functioning correctly.
- Identify the moisture sensor, which consists of two metal strips located on the back wall of the drum, positioned approximately 3 inches from the right edge and 8 inches down from the top rim.
- Examine the sensor’s wire harness connector, a white plastic connector with 2 wires (typically white and brown), located directly behind the sensor on the exterior of the drum housing.
- Touch one multimeter probe to the left metal strip of the sensor and the other probe to the right metal strip.
- Read the resistance value on the multimeter display. The sensor should show between 40,000 and 60,000 ohms (40K-60K) at room temperature when dry.
- Write down the resistance reading for reference.
- Dampen a clean cloth with plain water and wipe both metal sensor strips thoroughly.
- Immediately retest the resistance by placing the multimeter probes on the wet sensor strips.
- Observe the resistance reading drop to between 500 and 5,000 ohms when wet.
- If the dry reading shows infinite resistance (display shows “OL” or “1”) or zero ohms, the sensor has failed and requires replacement (part number WE04X25039).
- If the wet reading does not drop below 10,000 ohms, mineral buildup is preventing conductivity; proceed to cleaning, or if reading remains infinite, the sensor has failed.
- Dry the sensor strips completely with a clean, lint-free cloth and verify the reading returns to the 40K-60K range.
âś…
🔍 Step 7: If sensor doesn’t respond, replace
- Order replacement defrost sensor part number WR55X10025 or compatible equivalent for the GE GFD45ESSMWW.
- Verify you have the correct sensor by comparing the new part’s white plastic terminal block and wire lead length (approximately 12 inches) to the existing sensor still mounted in the freezer.
- Unplug the refrigerator from the wall outlet.
- Locate the defrost sensor wire connector inside the refrigerator compartment behind the rear panel where you previously tested it—a white 2-pin connector approximately 8 inches down from the top of the compartment, 4 inches from the right side.
- Squeeze the plastic tab on the connector and pull the two halves apart to disconnect the sensor from the main wiring harness.
- Trace the sensor wire down to where the sensor body attaches to the evaporator coil tubing in the center of the coil assembly.
- Use needle-nose pliers to spread open the spring clip securing the sensor to the copper tubing—pull the clip ends outward approximately 1/4 inch until the clip releases.
- Slide the old sensor and its rubber grommet off the evaporator tube.
- Slide the rubber grommet from the new sensor onto the evaporator tube at the same location where the old sensor was positioned.
- Position the new sensor’s metal probe directly against the copper tubing surface.
- Compress the spring clip with needle-nose pliers and slide it over the sensor body until it snaps into the groove, securing the sensor firmly against the tube—you should feel resistance when trying to rotate the sensor.
- Route the sensor wire along the same path as the original, using existing clips to secure it.
- Connect the white 2-pin connector to the main harness—push together until you hear and feel a distinct click indicating full seating.
- Plug the refrigerator back into the wall outlet.
âś…
đź’ˇ Step 8: Install new sensor bars if needed
- Remove the new sensor bar assembly from its packaging and identify the two separate bars – one for the left side (approximately 18 inches long) and one for the right side (matching length).
- Locate the wire harness connector attached to each new sensor bar – this is a white rectangular plug measuring roughly 1 inch wide with 2 metal pins visible inside.
- Starting with the right sensor bar, position it along the right interior door edge where the old sensor was located, with the infrared emitter (small clear plastic window) facing toward the left side of the door.
- Align the two mounting holes on the sensor bar bracket with the threaded holes in the door frame, spaced 14 inches apart vertically from top to bottom hole.
- Insert the upper mounting screw first and hand-tighten using a Phillips-head screwdriver #2, leaving it slightly loose for final adjustment.
- Insert the lower mounting screw and hand-tighten, then verify the sensor bar sits flush against the door edge with no gaps.
- Tighten both screws firmly, turning each 3-4 full rotations until the bracket no longer moves when pressed.
- Route the sensor wire along the door channel toward the bottom right corner where the control board connector is located, tucking the wire into the existing wire clips spaced every 6 inches.
- Repeat steps 3-8 for the left sensor bar, positioning it on the left interior door edge with the infrared receiver window facing right.
- Push each white wire connector onto its corresponding control board terminal until you hear and feel a distinct click – the connector should be fully seated with no gap between the plug body and the terminal housing.
- Verify both sensor bars are aligned horizontally across from each other at matching heights, with the infrared windows directly facing each other.
🧪
⚡ Step 9: Test moisture detection
- Open the dryer door and locate the two metal moisture sensor bars on the inside of the drum, positioned horizontally 3 inches from the front rim at the 4 o’clock and 8 o’clock positions.
- Dampen a clean cotton towel with water until it feels wet to the touch but not dripping.
- Place the damp towel flat against the drum surface, ensuring it contacts both moisture sensor bars simultaneously.
- Close the dryer door firmly until you hear the latch click.
- Press the Power button once to activate the control panel—the display will illuminate.
- Turn the cycle selector knob clockwise to the “Sensor Dry – Normal” setting.
- Press the Start button once—the dryer drum will begin rotating, and you will hear the blower motor activate within 3-5 seconds.
- Watch the estimated time remaining on the digital display—it should show approximately 35-45 minutes for the damp towel load.
- Allow the dryer to run for 5 minutes while listening for consistent drum rotation and airflow from the rear exhaust vent.
- Open the door mid-cycle—the dryer will stop automatically within 2 seconds, and the display will show “Door Open” or pause the countdown.
- Feel the towel for warmth—it should be noticeably warm to the touch, indicating proper heating element function.
- Close the door and press Start again—the cycle will resume from where it paused, and the timer will continue counting down.
- Let the cycle complete fully—when the moisture sensors detect the towel is dry, the dryer will automatically shut off, emit 3 short beeps, and display “Cycle Complete.”
- Open the door and verify the towel is completely dry with no damp spots.
- Turn the cycle selector to the Off position and close the door—your moisture sensor system is functioning correctly.
đź›’ Recommended Products
âś… Step 6: Test sensor resistance
- Locate your multimeter and rotate the dial to the resistance (Ω) setting, specifically to the 200K ohm range.
- Touch the two multimeter probes together and verify the reading shows 0 ohms or near-zero, confirming the meter is functioning correctly.
- Identify the moisture sensor, which consists of two metal strips located on the back wall of the drum, positioned approximately 3 inches from the right edge and 8 inches down from the top rim.
- Examine the sensor’s wire harness connector, a white plastic connector with 2 wires (typically white and brown), located directly behind the sensor on the exterior of the drum housing.
- Touch one multimeter probe to the left metal strip of the sensor and the other probe to the right metal strip.
- Read the resistance value on the multimeter display. The sensor should show between 40,000 and 60,000 ohms (40K-60K) at room temperature when dry.
- Write down the resistance reading for reference.
- Dampen a clean cloth with plain water and wipe both metal sensor strips thoroughly.
- Immediately retest the resistance by placing the multimeter probes on the wet sensor strips.
- Observe the resistance reading drop to between 500 and 5,000 ohms when wet.
- If the dry reading shows infinite resistance (display shows “OL” or “1”) or zero ohms, the sensor has failed and requires replacement (part number WE04X25039).
- If the wet reading does not drop below 10,000 ohms, mineral buildup is preventing conductivity; proceed to cleaning, or if reading remains infinite, the sensor has failed.
- Dry the sensor strips completely with a clean, lint-free cloth and verify the reading returns to the 40K-60K range.
âś…
🔍 Step 7: If sensor doesn’t respond, replace
- Order replacement defrost sensor part number WR55X10025 or compatible equivalent for the GE GFD45ESSMWW.
- Verify you have the correct sensor by comparing the new part’s white plastic terminal block and wire lead length (approximately 12 inches) to the existing sensor still mounted in the freezer.
- Unplug the refrigerator from the wall outlet.
- Locate the defrost sensor wire connector inside the refrigerator compartment behind the rear panel where you previously tested it—a white 2-pin connector approximately 8 inches down from the top of the compartment, 4 inches from the right side.
- Squeeze the plastic tab on the connector and pull the two halves apart to disconnect the sensor from the main wiring harness.
- Trace the sensor wire down to where the sensor body attaches to the evaporator coil tubing in the center of the coil assembly.
- Use needle-nose pliers to spread open the spring clip securing the sensor to the copper tubing—pull the clip ends outward approximately 1/4 inch until the clip releases.
- Slide the old sensor and its rubber grommet off the evaporator tube.
- Slide the rubber grommet from the new sensor onto the evaporator tube at the same location where the old sensor was positioned.
- Position the new sensor’s metal probe directly against the copper tubing surface.
- Compress the spring clip with needle-nose pliers and slide it over the sensor body until it snaps into the groove, securing the sensor firmly against the tube—you should feel resistance when trying to rotate the sensor.
- Route the sensor wire along the same path as the original, using existing clips to secure it.
- Connect the white 2-pin connector to the main harness—push together until you hear and feel a distinct click indicating full seating.
- Plug the refrigerator back into the wall outlet.
âś…
đź’ˇ Step 8: Install new sensor bars if needed
- Remove the new sensor bar assembly from its packaging and identify the two separate bars – one for the left side (approximately 18 inches long) and one for the right side (matching length).
- Locate the wire harness connector attached to each new sensor bar – this is a white rectangular plug measuring roughly 1 inch wide with 2 metal pins visible inside.
- Starting with the right sensor bar, position it along the right interior door edge where the old sensor was located, with the infrared emitter (small clear plastic window) facing toward the left side of the door.
- Align the two mounting holes on the sensor bar bracket with the threaded holes in the door frame, spaced 14 inches apart vertically from top to bottom hole.
- Insert the upper mounting screw first and hand-tighten using a Phillips-head screwdriver #2, leaving it slightly loose for final adjustment.
- Insert the lower mounting screw and hand-tighten, then verify the sensor bar sits flush against the door edge with no gaps.
- Tighten both screws firmly, turning each 3-4 full rotations until the bracket no longer moves when pressed.
- Route the sensor wire along the door channel toward the bottom right corner where the control board connector is located, tucking the wire into the existing wire clips spaced every 6 inches.
- Repeat steps 3-8 for the left sensor bar, positioning it on the left interior door edge with the infrared receiver window facing right.
- Push each white wire connector onto its corresponding control board terminal until you hear and feel a distinct click – the connector should be fully seated with no gap between the plug body and the terminal housing.
- Verify both sensor bars are aligned horizontally across from each other at matching heights, with the infrared windows directly facing each other.
🧪
⚡ Step 9: Test moisture detection
- Open the dryer door and locate the two metal moisture sensor bars on the inside of the drum, positioned horizontally 3 inches from the front rim at the 4 o’clock and 8 o’clock positions.
- Dampen a clean cotton towel with water until it feels wet to the touch but not dripping.
- Place the damp towel flat against the drum surface, ensuring it contacts both moisture sensor bars simultaneously.
- Close the dryer door firmly until you hear the latch click.
- Press the Power button once to activate the control panel—the display will illuminate.
- Turn the cycle selector knob clockwise to the “Sensor Dry – Normal” setting.
- Press the Start button once—the dryer drum will begin rotating, and you will hear the blower motor activate within 3-5 seconds.
- Watch the estimated time remaining on the digital display—it should show approximately 35-45 minutes for the damp towel load.
- Allow the dryer to run for 5 minutes while listening for consistent drum rotation and airflow from the rear exhaust vent.
- Open the door mid-cycle—the dryer will stop automatically within 2 seconds, and the display will show “Door Open” or pause the countdown.
- Feel the towel for warmth—it should be noticeably warm to the touch, indicating proper heating element function.
- Close the door and press Start again—the cycle will resume from where it paused, and the timer will continue counting down.
- Let the cycle complete fully—when the moisture sensors detect the towel is dry, the dryer will automatically shut off, emit 3 short beeps, and display “Cycle Complete.”
- Open the door and verify the towel is completely dry with no damp spots.
- Turn the cycle selector to the Off position and close the door—your moisture sensor system is functioning correctly.
đź›’ Recommended Products
đź’ˇ Step 8: Install new sensor bars if needed
- Remove the new sensor bar assembly from its packaging and identify the two separate bars – one for the left side (approximately 18 inches long) and one for the right side (matching length).
- Locate the wire harness connector attached to each new sensor bar – this is a white rectangular plug measuring roughly 1 inch wide with 2 metal pins visible inside.
- Starting with the right sensor bar, position it along the right interior door edge where the old sensor was located, with the infrared emitter (small clear plastic window) facing toward the left side of the door.
- Align the two mounting holes on the sensor bar bracket with the threaded holes in the door frame, spaced 14 inches apart vertically from top to bottom hole.
- Insert the upper mounting screw first and hand-tighten using a Phillips-head screwdriver #2, leaving it slightly loose for final adjustment.
- Insert the lower mounting screw and hand-tighten, then verify the sensor bar sits flush against the door edge with no gaps.
- Tighten both screws firmly, turning each 3-4 full rotations until the bracket no longer moves when pressed.
- Route the sensor wire along the door channel toward the bottom right corner where the control board connector is located, tucking the wire into the existing wire clips spaced every 6 inches.
- Repeat steps 3-8 for the left sensor bar, positioning it on the left interior door edge with the infrared receiver window facing right.
- Push each white wire connector onto its corresponding control board terminal until you hear and feel a distinct click – the connector should be fully seated with no gap between the plug body and the terminal housing.
- Verify both sensor bars are aligned horizontally across from each other at matching heights, with the infrared windows directly facing each other.
🧪
⚡ Step 9: Test moisture detection
- Open the dryer door and locate the two metal moisture sensor bars on the inside of the drum, positioned horizontally 3 inches from the front rim at the 4 o’clock and 8 o’clock positions.
- Dampen a clean cotton towel with water until it feels wet to the touch but not dripping.
- Place the damp towel flat against the drum surface, ensuring it contacts both moisture sensor bars simultaneously.
- Close the dryer door firmly until you hear the latch click.
- Press the Power button once to activate the control panel—the display will illuminate.
- Turn the cycle selector knob clockwise to the “Sensor Dry – Normal” setting.
- Press the Start button once—the dryer drum will begin rotating, and you will hear the blower motor activate within 3-5 seconds.
- Watch the estimated time remaining on the digital display—it should show approximately 35-45 minutes for the damp towel load.
- Allow the dryer to run for 5 minutes while listening for consistent drum rotation and airflow from the rear exhaust vent.
- Open the door mid-cycle—the dryer will stop automatically within 2 seconds, and the display will show “Door Open” or pause the countdown.
- Feel the towel for warmth—it should be noticeably warm to the touch, indicating proper heating element function.
- Close the door and press Start again—the cycle will resume from where it paused, and the timer will continue counting down.
- Let the cycle complete fully—when the moisture sensors detect the towel is dry, the dryer will automatically shut off, emit 3 short beeps, and display “Cycle Complete.”
- Open the door and verify the towel is completely dry with no damp spots.
- Turn the cycle selector to the Off position and close the door—your moisture sensor system is functioning correctly.
đź›’ Recommended Products
Here are the recommended products for this repair:
- (2 Pack) Rayhoor 6500EL3001A Dryer Moisture Sensor Bar Replacement Part Fit for LG Kenmore – Replaces PD00001914, 1268224, AP4445128, EAP3529161
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