Electrolux EFLS627UTT (Front Load) – Pressure sensor issues Repair Guide

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🔩 Pressure sensor issues Repair Guide for Electrolux EFLS627UTT (Front Load)

💡 Don’t panic! Pressure sensor issues on your Electrolux EFLS627UTT (Front Load) is a common issue that many DIY enthusiasts can fix themselves. This comprehensive guide will walk you through the repair process step by step.

📋 What You’ll Need

  • Pressure sensor
  • Air trap
  • Multimeter

    • ⚠️ Safety First

    Before you begin, always:

    • Unplug the washing machine from power
    • Turn off water supply valves
    • Allow the machine to cool down if it was recently running
    • Have a clean, well-lit workspace

      • 🔧 Step-by-Step Repair Instructions

      🧹

      🔧 Step 1: Clean air trap

      1. Locate the lower access panel at the bottom front of the washer, centered approximately 18 inches from the left edge and 2 inches above floor level.
      2. Grip the access panel at the top edge with both hands and pull firmly toward you – it releases from spring clips without requiring tools.
      3. Set the access panel aside and look inside the opening – you’ll see two components: a black circular drain pump filter on the left and a white rectangular air trap housing on the right.
      4. Identify the air trap housing, which is a white plastic box measuring approximately 3×4 inches with a clear plastic front cover secured by a single rotating latch.
      5. Place a shallow pan or towels beneath the air trap opening to catch residual water (expect 1-2 cups maximum).
      6. Rotate the latch on the air trap cover 90 degrees counterclockwise – it will move from the vertical locked position to horizontal unlocked position.
      7. Pull the clear plastic cover straight out toward you – it will separate completely from the white housing.
      8. Remove any visible debris from inside the air trap chamber using your fingers – common items include coins, lint buildup, fabric fibers, and small objects from pockets.
      9. Wipe the interior chamber walls with a damp cloth, removing all accumulated residue and buildup.
      10. Inspect the rubber seal on the perimeter of the clear cover – it should be intact without cracks or tears.
      11. Clean the rubber seal with a damp cloth to remove any lint or debris.
      12. Align the clear cover with the white housing and press firmly until it seats completely flush against the housing.
      13. Rotate the latch 90 degrees clockwise back to the vertical locked position – you’ll feel resistance when it clicks into place.
      14. Reinstall the lower access panel by aligning the bottom tabs first, then pressing the top edge until all clips audibly snap into place.

      🛠️ Step 2: Test sensor with multimeter

      1. Set your digital multimeter to the resistance (Ohms/Ω) setting at 20K or 200K range.
      2. Locate the thermistor sensor – a small cylindrical component approximately 1 inch long with two wire leads, positioned on the right side of the outer tub, 8 inches down from the top rim.
      3. Grasp the white plastic wire connector attached to the thermistor’s two-wire harness and pull straight back to disconnect it from the main wiring harness.
      4. Touch one multimeter probe to each of the two metal terminals on the thermistor itself (not the wire connector).
      5. Read the resistance value displayed on your multimeter – at room temperature (68-72°F), the reading should be between 50,000-52,000 ohms (50-52K).
      6. Fill a drinking glass with ice water and submerge the metal tip of the thermistor in the water for 60 seconds while keeping the probes connected.
      7. Watch the multimeter reading – it should climb to between 95,000-105,000 ohms (95-105K) in the ice water (approximately 32°F).
      8. Remove the thermistor from the ice water and heat the metal tip with a hair dryer on high setting for 30 seconds.
      9. Observe the reading drop to between 15,000-20,000 ohms (15-20K) when heated to approximately 120°F.
      10. If any reading falls outside these ranges by more than 10%, or if the display shows “OL” (open loop/infinite resistance) or “0” (short circuit), the thermistor has failed and requires replacement with part number 134587700.
      11. If all readings are within acceptable ranges, reconnect the white wire connector by pushing it firmly onto the thermistor terminals until you hear a distinct click.
      12. Write down your test results: room temperature reading, cold reading, and hot reading for reference during reassembly verification.

      ⚙️ Step 3: Check sensor connections

      1. Locate the main sensor cluster on the right side of the drum housing, approximately 4 inches below the top panel and 2 inches from the right edge when facing the machine.
      2. Identify the thermistor sensor connector—a white rectangular plug with 2 wires (one orange, one white) positioned at the 2 o’clock position relative to the drum opening.
      3. Press the release tab on top of the thermistor connector using your index finger while pulling the connector straight out with steady, even pressure until it separates (approximately 1/4 inch of travel).
      4. Examine the metal pins inside both the male and female sides of the connector—look for any green corrosion, black burn marks, or bent pins.
      5. If corrosion is present, spray electrical contact cleaner directly onto the pins and wipe clean with a lint-free cloth until the brass color is visible.
      6. Check that all pins are straight and parallel—if any are bent, use needle-nose pliers to carefully straighten them by gripping the base and applying pressure in the opposite direction of the bend.
      7. Move to the pressure sensor located 8 inches below the thermistor—a gray circular connector with a single clear air hose attached and 3 wires (black, brown, and blue).
      8. Squeeze the locking tabs on both sides of the pressure sensor connector simultaneously and pull straight back to disconnect.
      9. Inspect this connector the same way as the thermistor, looking for the same signs of damage or corrosion.
      10. Reconnect the pressure sensor by aligning the connector and pushing firmly until you hear a distinct click sound, indicating the locking tabs have engaged.
      11. Reconnect the thermistor connector by aligning the plug and pushing straight in until it clicks into place.
      12. Gently tug on each reconnected wire harness with 3-5 pounds of force to verify the connections are secure—they should not pull apart.

      🔩 Step 4: Replace sensor if faulty

      1. Locate the thermistor sensor assembly mounted on the rear of the outer drum, positioned approximately 8 inches down from the top center of the drum housing and 3 inches to the right of the center vertical line.
      2. Identify the white plastic sensor housing (approximately 1.5 inches in diameter) with a single wire harness connector extending from its back.
      3. Press the locking tab on the wire connector using your thumb while pulling the connector straight away from the sensor with your other hand – the connector will separate with approximately 2 pounds of force.
      4. Grip the entire sensor housing and rotate it 45 degrees counterclockwise – you’ll feel resistance for the first 30 degrees, then it will turn freely for the final 15 degrees.
      5. Pull the sensor assembly straight out from its mounting hole – it will slide out approximately 2 inches until completely free from the drum housing.
      6. Remove the old sensor from your workspace and retrieve the new thermistor sensor (part number 134587700 or equivalent).
      7. Align the new sensor’s plastic tabs with the slots in the mounting hole – the tabs are positioned at 12 o’clock and 6 o’clock when properly oriented.
      8. Push the new sensor into the mounting hole until it bottoms out, then rotate 45 degrees clockwise until you hear and feel a distinct click indicating the locking tabs have engaged.
      9. Reconnect the wire harness by aligning the connector’s keyed shape with the sensor terminals and pushing firmly until you hear an audible click – verify the connection by gently tugging with 3-4 pounds of force; it should not separate.
      10. Verify proper installation by checking that the sensor housing sits flush against the drum surface with no gaps exceeding 1/16 inch around its perimeter.

      đź“‹ Step 5: Test water level detection

      1. Locate the pressure switch mounted on the right side of the washer tub, approximately 8 inches down from the top rim and 3 inches from the right edge of the cabinet.
      2. Identify the clear plastic air tube (approximately 1/4 inch diameter) connected to the bottom port of the pressure switch.
      3. Disconnect the air tube by pulling it straight off the pressure switch port with a firm, steady pull.
      4. Remove the pressure switch by rotating it 45 degrees counterclockwise and pulling it straight out from its mounting bracket.
      5. Set your multimeter to the continuity setting (ohm symbol with sound wave icon).
      6. Locate the three metal terminals on the back of the pressure switch – they will be labeled “C” (common, center position), “NO” (normally open, left position), and “NC” (normally closed, right position).
      7. Touch the multimeter probes to terminals “C” and “NC” – you should hear a continuous beep indicating a closed circuit.
      8. Blow gently into the air tube port on the pressure switch with steady breath pressure for 2-3 seconds.
      9. While maintaining air pressure, the beep should stop, indicating the switch has opened.
      10. Release air pressure and touch probes to terminals “C” and “NO” – you should now hear no beep.
      11. Blow into the port again – you should hear a beep start when pressure reaches approximately 2-3 PSI, indicating the switch has closed the “NO” circuit.
      12. If the switch fails either test (no change in continuity when air pressure is applied), the pressure switch requires replacement (part number 137006000).
      13. Reconnect the pressure switch by inserting it into the mounting bracket and rotating 45 degrees clockwise until it locks with an audible click.
      14. Push the clear air tube firmly onto the pressure switch port until it seats completely – you will feel resistance stop at approximately 3/4 inch insertion depth.

      đź’ˇ Pro Tips

      Take photos as you disassemble components – they’ll be invaluable when putting everything back together. If you encounter resistance or something doesn’t seem right, stop and reassess rather than forcing it.

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