Whirlpool Under-Tub Leak / Sump or Hose Failure

Dishwasher leaks from underneath; water appears on the floor under the unit.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Cracked sump assembly, Leaking diverter or pump seal, Loose or cracked drain or fill hose, Leaking inlet valve connection

How to Fix / Troubleshooting

Safety First: Turn off power and water supply immediately. Do not continue running the dishwasher.

  • Remove toe-kick: Inspect the area under the dishwasher with a flashlight to locate the source of the leak.
  • Check hoses and clamps: Tighten any loose clamps on the drain and fill hoses; replace hoses that show cracks or bulges.
  • Inspect sump and pump seals: Look for water around the sump, circulation pump, and diverter. If seals are leaking, replace the affected assembly or seal kit.
  • Test after repair: Run a short cycle while observing underneath to confirm the leak is resolved.
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Repair Difficulty

Hard 4/5

Required Part

Sump Assembly, Diverter Seal, or Hoses
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