Dishwasher circulation pump pressurizes wash water through spray arms. Related symptoms include fills without washing, weak spray, grinding or motor codes. Those symptoms do not prove the component failed: confirm fill, spray-arm movement and approved filter condition. Remove and rinse the filter and look at the sump for debris.
What this covers
- dishwashers
What it does not cover
Differential
Likely causes of “Dishwasher circulation pump”, and how to tell them apart
- 1
The filter or the sump is clogged, so the pump cannot draw water
What separates it The dishwasher fills but wash spray is weak or absent, and the filter is packed with food.
How to confirm Remove and rinse the filter and look at the sump for debris.
- 2
The water level is too low
What separates it The pump runs dry or noisy because the fill did not complete, and the supply valve is partly closed.
How to confirm Check that the water supply is open and that the tub fills to the level shown in the manual.
- 3
A spray arm is jammed or a rack blocks the flow
What separates it The pump sounds normal but spray is weak on one level, and the arm does not turn freely.
How to confirm Spin the arms by hand and check that nothing blocks their movement.
- 4
The pump motor or its seal has failed
What separates it A grinding, humming or a motor code appears with a clean filter and full fill, and water may leak under the tub.
How to confirm This is a service repair, and the pump sits under the tub, so it needs the machine pulled out.
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the tub fills and whether spray reaches the racks.
- Any sound: humming, grinding or silence during the wash stage.
- The exact code and the state of the filter.
Try in this order
0 of 2 completedTest before you replace
ReversibleConfirm fill, spray-arm movement and approved filter condition.
Weigh the repair
ReversibleReplacement difficulty for the dishwasher circulation pump is high because pump, heater and seals may integrate.
Stop boundary
When this stops being a self-service repair
- !Disconnect power and close the water before any repair; the pump sits under the tub, and a wrong seal repair causes leaks.
- !Stop for a grinding or burning smell, or water under the machine.
Evidence ledger
Sources behind this answer
Exact questions
Common questions
What does the circulation pump do?+
It pressurises the water so that it goes through the spray arms with force. A weak pump gives weak spray even when the machine fills correctly.
How can I tell it is failing?+
Poor cleaning, weak spray, humming or grinding noises, or error codes tied to circulation. Check filters and spray arms first.
Is it a home repair?+
It can be, with power off and the part matched to your model, but the fault is often a clog or a control issue, so check simpler causes first.