LG Dishwasher Not Draining — Fix Standing Water Fast

Common Symptoms

• OE error code displayed on the control panel
• Standing water pooling at the bottom of the dishwasher tub after a cycle
• Dishwasher cycle stops mid-cycle and will not continue
• Dishes smell sour or mildewy after washing
• Gurgling sounds from the drain area during or after a cycle
• Water backing up into the kitchen sink when the dishwasher drains

Most Likely Causes

1. 1

   Clogged LG Filter Basket (Most Common — OE Error)

   LG dishwashers use a twist-off cylindrical filter at the base of the wash tub that traps food particles. When this filter becomes packed with debris, water cannot pass through to the drain pump and the OE code fires. The LG filter system has two parts: a coarse mesh outer basket and a fine inner filter. Both must be cleaned. LG recommends cleaning the filter monthly, but homes with hard water or heavy use may need weekly cleaning.

2. 2

   Kinked or Blocked Drain Hose

   The drain hose runs from the pump outlet behind the dishwasher to the sink drain or garbage disposal. A sharp bend, kink, or partial blockage in the hose restricts water flow and can trigger an OE error even when the filter and pump are healthy. The hose must loop up to cabinet height (high loop) before dropping to the drain connection — a hose that drops straight down invites siphoning and backflow.

3. 3

   Garbage Disposal Knockout Plug Not Removed

   If your dishwasher was recently connected to a new garbage disposal, the plastic knockout plug inside the disposal's dishwasher inlet may still be in place. This plug must be knocked out with a screwdriver before connecting the drain hose — if it was left in, water has nowhere to go and will back up into the dishwasher every cycle.

4. 4

   Stuck or Clogged Check Valve

   The check valve (also called the drain valve flapper) is a one-way valve that prevents drained water from flowing back into the tub. When it becomes coated with grease or debris, it can stick in the closed position and block drainage entirely. The check valve is typically located on the drain pump outlet and can often be cleaned without replacing.

5. 5

   Failed LG Drain Pump

   If the filter, hose, and check valve are all clear but water still won't drain, the drain pump motor may have failed or the pump impeller may be jammed with glass or debris. A failed pump will often be silent when the dishwasher tries to drain — you may hear the dishwasher pause and restart without hearing the pump running. LG drain pump replacements typically cost $60–$120 as a DIY repair.

Quick DIY Checks

1. 1Cancel the current cycle and open the dishwasher door. If there is standing water in the tub, use a towel or sponge to absorb most of it, or use a wet/dry vacuum to remove the water before proceeding. This makes the filter access much easier and reduces spill risk.
2. 2Clean the LG filter assembly: at the bottom of the tub, locate the cylindrical filter unit in the center or rear of the wash floor. Twist it counter-clockwise approximately a quarter turn to unlock, then pull it straight up. On most LG models the filter separates into two pieces — a coarse outer mesh basket and a fine cylindrical inner filter. Rinse both pieces under warm running water, scrubbing with a soft brush (an old toothbrush works well) to dislodge grease and food particles. Hold the inner filter up to a light to confirm all pores are clear. Reinstall by aligning the tabs, pressing down, and twisting clockwise until it clicks.
3. 3Check the drain hose for kinks: pull the dishwasher out slightly from under the counter (after turning off the power at the breaker) and trace the drain hose from the back of the dishwasher to where it connects to the sink drain or garbage disposal. Straighten any kinks. Verify the hose makes a high loop up to the underside of the counter before dropping to the drain — this prevents backflow. If connecting to a garbage disposal, confirm the plastic knockout plug inside the disposal inlet was removed when the dishwasher was installed.

1. 4Run a Drain Only cycle if your LG model offers one. If the dishwasher attempts to drain but water stays in the tub, listen for the drain pump: you should hear a distinct humming or buzzing from underneath. No sound at all suggests a pump failure or loss of power to the pump. A humming pump that moves no water suggests a jammed impeller — debris such as a broken piece of glass can jam the impeller and prevent rotation.
2. 5Access and inspect the check valve: unplug the dishwasher and remove the lower spray arm and filter assembly. Locate the pump housing at the base of the tub — the check valve is a small rubber or plastic flap on the drain outlet side. Remove any visible debris and flex the flap by hand to confirm it opens and closes freely. If it is cracked or deformed, replace it. Reassemble, restore power, and run a short wash cycle to confirm draining.
3. 6Clear the OE error code after fixing the root cause: press and hold the Start/Pause button for 3 seconds to clear the error. Then run a short cycle (Quick Wash if available) and watch during the drain phase to confirm water is fully evacuating the tub. If OE returns, use the Fix-It Fast AI appliance scan tool to look up your specific LG model number for additional model-specific tips.

Repair vs Replace

Recommended Tools & Parts

• LG Dishwasher Drain Pump Assembly

  OEM-compatible drain pump motor for LG dishwashers. Fixes OE error when filter and hose are clear but water will not drain. Verify your model number — common LG pump part numbers include EAU61383510 and EAU61383501.

  $60–$120

  Buy on Amazon →

• LG Dishwasher Filter Assembly

  Replacement 2-piece filter kit for LG dishwashers (outer mesh basket + inner cylindrical filter). Install if the filter is cracked, torn, or permanently clogged with mineral deposits. Match your model number.

  $15–$35

  Buy on Amazon →

• Wet/Dry Vacuum

  Essential for removing standing water from the dishwasher tub before servicing. Makes filter access faster and reduces spill cleanup.

  $30–$80

  Buy on Amazon →

• Dishwasher Drain Hose Universal

  Universal dishwasher drain hose for replacement if the existing hose is kinked, cracked, or permanently deformed. Approximately 6 feet length with clamps included.

  $12–$25

  Buy on Amazon →

Links are Amazon affiliate links (tag: fixitfastai-20). Prices are estimates.

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