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Whirlpool Dishwasher Drain Pump Replacement - Signs & How-To

4 min read
⚡ Quick Answer

Water pooling in the tub, drain error codes, or gurgling during drain cycles mean your pump is blocked or failed. Replacing it restores drainage.

Difficulty Intermediate (DIY)
Est. time 15-60 min
Tools Multimeter , nut driver, screwdrivers

Whirlpool Dishwasher Drain Pump Replacement — What This Part Does

The drain pump forces water out of the dishwasher tub at the end of each cycle, pushing it through the drain hose to your disposal or sink drain. Whirlpool lists drain faults as obstructed drain hoses or paths, fractured impellers, open motor windings, debris stuck in the impeller, open fuses on the control to the drain motor, or a failed drain motor drive circuit on the control.

Over time, food debris jams the impeller, the impeller cracks from wear, or the motor windings open. When the control detects that the machine did not achieve a normal drain condition during the diagnostic or cycle sequence, it throws a drain fault. A plugged garbage disposal, un-removed knockout plug, drain loop check-valve issue, plugged hoses, or loose high-resistance connections can all trigger the same symptom.

Jump to Replacement Steps

Signs It Needs Replacing

How to Replace It

  1. Unplug the dishwasher from the wall outlet or switch off the dedicated breaker, and turn off the water supply valve under the sink.
  2. Enter diagnostic mode per your service sheet and verify the drain error code before replacing any parts.
  3. Check the external drain path first by inspecting the hose from the sump or check valve all the way to the disposal or sink drain, confirming the garbage disposal inlet knockout was removed and the drain loop is not obstructed, and clearing any kinks, clogs, or blocked check-valve passages.
  4. Remove the lower dish rack and the filter assembly from the tub floor, then pull out any debris or water from the sump cavity.
  5. Remove the toe kick or bottom access panel, locate the drain pump on the left side of the sump housing, and disconnect the two-wire electrical connector from the pump.
  6. Release the pump retaining tab by pressing or rotating it per your model’s design, then twist or pull the drain pump body out of the sump housing.
  7. Check the old impeller for fractures, binding, or debris, and confirm that normal hand rotation has some uneven resistance but is not free-spinning or seized.
  8. Test the drain motor winding resistance with a multimeter and inspect all wire connections in the drain circuit for loose or high-resistance terminals if the pump does not show obvious mechanical damage.
  9. Install the new drain pump by inserting the pump into the sump housing, rotating or snapping the retaining tab into place, reconnecting the two-wire harness, and verifying the pump seats flush against the housing.
  10. Reinstall the filter assembly and lower rack, restore power and water, and run a rinse cycle in diagnostic mode to confirm the pump energizes and evacuates water completely.

The Part You Need

PartNotes
Whirlpool dishwasher drain pumpAmazon | Look up your exact model and serial number on the data plate inside the door edge or tub wall to cross-reference the correct drain pump part number from Whirlpool or an authorized parts supplier.

If this part is failing you may also see one of these codes:

When to Call a Pro

If the new drain pump still does not run or the error persists after you have cleared all drain-path blockages and confirmed good wiring resistance, the issue is likely an open fuse on the control to the drain motor or a failed drain motor drive circuit on the control. Testing and replacing the electronic control requires tracing live circuits and working inside the door panel, so call a factory-trained technician to diagnose control-side faults safely.


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