LG LDT7808SS (QuadWash) – LE error code Repair Guide

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Model: LG LDT7808SS (QuadWash)
Brand: LG
Model Number: LDT7808SS

🔍 Problem Description

Check drain pump and filter; test motor; inspect sump for debris

📋 What You’ll Need

  • Drain pump
  • Cleaning tools

    • 🔧 Step-by-Step Repair Instructions

      🔧 Step 1: Check drain pump and filter for blockages

      1. Turn off power to the dishwasher at the circuit breaker.
      2. Open the dishwasher door completely and remove the lower dish rack by lifting it straight up and out.
      3. Locate the circular filter assembly in the center of the dishwasher floor—it’s a 5-inch diameter cylinder with a mesh screen on top.
      4. Grasp the filter assembly and turn it counterclockwise approximately 1/4 turn (90 degrees) until it releases.
      5. Lift the filter assembly straight up and out—it consists of 2 pieces: the upper cylindrical filter and the lower flat mesh screen.
      6. Separate the two filter pieces by pulling them apart with your hands.
      7. Rinse both filter components under hot running water, using a soft-bristled brush to remove food particles, grease, and debris from the mesh openings.
      8. Look into the sump area (the now-exposed circular opening in the dishwasher floor) and remove any visible debris, food particles, or standing water using a wet/dry vacuum or absorbent towels.
      9. Locate the drain pump cover—a white or gray plastic circular disc approximately 3 inches in diameter at the bottom of the sump.
      10. Twist the drain pump cover counterclockwise to remove it (no tools required).
      11. Check inside the drain pump chamber for obstructions—common items include: broken glass, bones, toothpicks, fruit pits, or small utensils.
      12. Remove any debris by hand or with needle-nose pliers.
      13. Feel around the interior of the pump chamber with your finger to confirm the impeller (small plastic fan blade) rotates freely when pushed—it should spin with minimal resistance.
      14. Reinstall the drain pump cover by aligning the tabs and turning clockwise until it stops and feels secure.
      15. Reassemble the two-piece filter by pressing them together until they click.
      16. Insert the filter assembly back into the sump and turn clockwise 1/4 turn to lock it in place—you’ll feel it seat firmly.

      🛠️ Step 2: Test drain pump motor operation

      1. Locate the drain pump assembly at the bottom left corner of the dishwasher tub, approximately 4 inches from the left side and 2 inches from the front edge.
      2. Identify the white wire connector attached to the drain pump motor—it’s a rectangular plug with 2 wires (typically black and white) measuring approximately 1 inch wide.
      3. Grasp the connector body (not the wires) and pull straight away from the pump motor terminals until it disconnects with a light snap.
      4. Set your multimeter to the ohms (Ω) setting at 200 ohms range.
      5. Touch one multimeter probe to each of the two metal terminals on the drain pump motor itself (where the connector was attached).
      6. Read the resistance value on your multimeter display—a functional drain pump motor will show between 8 and 12 ohms. If the reading shows “OL” (overload) or infinite resistance, the motor winding is open and the pump has failed.
      7. Move your multimeter dial to the continuity setting (often marked with a sound wave symbol).
      8. Touch one probe to either pump motor terminal and the other probe to the metal pump housing—you should get no beep and no continuity reading, indicating proper insulation.
      9. Reconnect the white wire connector to the drain pump motor terminals by aligning the connector with the terminals and pushing firmly until you hear and feel a definite click.
      10. Rotate the drain pump impeller by inserting a flathead screwdriver (5mm width) into the pump outlet (the ribbed tube extending from the pump housing) and turning clockwise—the impeller should spin freely without grinding or catching.
      11. If resistance measured correctly (8-12 ohms), no shorts to ground existed, and the impeller spins freely, the drain pump motor is functioning properly and the drainage issue lies elsewhere in the system.

      ⚙️ Step 3: Inspect sump area for debris

      1. Locate the circular filter assembly in the center bottom of the dishwasher tub and rotate it counterclockwise one-quarter turn to unlock it.
      2. Lift the filter assembly straight up and out of the sump housing – it consists of two pieces: the fine mesh cylindrical filter and the coarse filter plate beneath it.
      3. Set the filters aside on a towel near your work area.
      4. Look into the now-exposed sump chamber – you’ll see a circular well approximately 4 inches in diameter and 3 inches deep with a white plastic impeller cover at the bottom center.
      5. Use a flashlight to illuminate the sump area and check for debris around the perimeter of the impeller cover and in the recessed grooves.
      6. Remove any visible food particles, broken glass, bones, toothpicks, or hard objects using needle-nose pliers or your fingers.
      7. Grasp the white impeller cover tab located on the right side and twist counterclockwise one-eighth turn, then lift it straight up to remove.
      8. Inspect the exposed chopper blade assembly beneath – it looks like a propeller with 2 blades, positioned horizontally.
      9. Attempt to rotate the chopper blade manually with your index finger – it should spin freely with slight resistance. If it binds or doesn’t move, note this for further investigation.
      10. Check for any debris wrapped around the chopper blade shaft or lodged between the blade and housing walls.
      11. Use needle-nose pliers to extract any foreign objects, stringy material, or food buildup from around the chopper mechanism.
      12. Wipe the sump walls with a damp cloth to remove any grease film or residue buildup.
      13. Replace the white impeller cover by aligning the tab marking and twisting clockwise one-eighth turn until it locks into place – you’ll feel it seat firmly.
      14. Leave filters out for now as you proceed to the next diagnostic step.

      🔩 Step 4: Clean filter and sump thoroughly

      1. Grasp the cylindrical micro-filter (located in the center of the circular fine filter assembly) and rotate it counterclockwise one-quarter turn, then lift straight up to remove it from the sump.
      2. Hold the circular fine filter by its outer rim and rotate it counterclockwise approximately 45 degrees until it releases from the three locking tabs in the sump basin, then lift it out.
      3. Remove any large food particles from both filters using your fingers, dropping debris into a trash bag.
      4. Place both filters under running hot water (120-140°F) at your kitchen sink and use a soft-bristled nylon brush to scrub all mesh surfaces, working from the inside out in circular motions.
      5. For stubborn grease buildup, mix 2 tablespoons of dish soap with 1 quart of hot water in a container and soak both filters for 10 minutes, then scrub again with the nylon brush.
      6. Reach into the sump basin (the round well in the dishwasher floor where the filters sat) and remove any visible food debris, glass, or other objects with your fingers.
      7. Soak a clean microfiber cloth in hot soapy water and wipe the entire interior surface of the sump basin, including the walls and bottom, removing any slimy residue or buildup.
      8. Locate the gray plastic spray arm support hub at the bottom center of the sump—wipe around and underneath this component where debris commonly collects.
      9. Rinse your cleaning cloth under hot water and wipe the sump basin a second time to remove all soap residue.
      10. Inspect both filters under good light—the mesh should appear clean with no visible grease film or blocked holes.
      11. Insert the circular fine filter back into the sump, aligning the three tabs on the filter with the three slots in the sump basin, then rotate clockwise 45 degrees until it locks into place with a firm click.
      12. Place the cylindrical micro-filter into the center opening and rotate clockwise one-quarter turn until it stops and locks securely.

      đź“‹ Step 5: Replace drain pump if motor fails

      1. Pull the dishwasher forward approximately 18-24 inches from the cabinet opening to access the underside components.
      2. Tilt the dishwasher backward at a 30-degree angle and prop it securely on a block of wood or have someone hold it—this provides clear access to the drain pump assembly located at the bottom front center.
      3. Locate the drain pump assembly—a black cylindrical motor unit approximately 4 inches in diameter positioned directly beneath the sump area, 8 inches from the front edge.
      4. Disconnect the gray wire harness connector from the pump motor by squeezing the locking tab on top and pulling straight up—you’ll feel it release with a slight pop.
      5. Use needle-nose pliers to compress the spring clamp on the drain hose connection (the corrugated hose on the pump’s outlet side), slide the clamp 2 inches away from the fitting, then twist and pull the hose off the pump outlet.
      6. Remove the single black rubber inlet hose from the pump inlet (bottom connection) by twisting counterclockwise 90 degrees and pulling downward—water will drain out, approximately 1-2 cups.
      7. Use a 10mm socket wrench to remove the three mounting bolts securing the pump assembly to the sump housing, turning counterclockwise—they’re positioned in a triangular pattern around the pump base.
      8. Pull the entire drain pump assembly straight down and away from the sump housing—it will separate with a firm tug.
      9. Position the new drain pump (LG part number 5859DD9001A) into the sump housing, aligning the three mounting holes.
      10. Thread in the three 10mm mounting bolts finger-tight, then tighten in a star pattern to snug—approximately one full turn past finger-tight.
      11. Push the rubber inlet hose onto the pump inlet and rotate clockwise 90 degrees until it locks into position.
      12. Slide the drain hose onto the outlet fitting until it bottoms out (approximately 1 inch deep), then reposition the spring clamp directly over the connection point.
      13. Reconnect the wire harness connector until you hear an audible click.
      14. Return the dishwasher to upright position and slide it back into the cabinet opening.

      đź›’ Recommended Products

      Here are the recommended products for this repair: