Whirlpool Dishwasher Error Code F12 — What It Means & How to Fix It

What Does This Error Mean?

Whirlpool dishwasher error F12 means the circulation pump — the main wash pump that sprays water on your dishes — has a fault. Dishes are not being washed because water is not circulating through the spray arms. This needs to be fixed before the dishwasher can clean properly.

Affected Models

WDT730PAHZ
WDT780SAEM
WDT970SAKZ
WDF520PADM
WDTA50SAHZ

Common Causes

A hard object like a bone, toothpick, or glass fragment is jammed in the circulation pump impeller
The circulation pump motor has failed from age or overheating caused by a blockage
The spray arms are clogged and causing backpressure that overloads the circulation pump
A wiring harness connector to the circulation pump motor is loose or damaged
The capacitor on the circulation pump motor has failed, preventing the motor from starting

How to Fix It

Cancel the current cycle and open the dishwasher. Remove the bottom rack.

Give the interior a few minutes to cool if a cycle was running — the water inside may be hot.
Remove the filter assembly from the center of the tub floor. Check it for debris and rinse it clean.

A severely clogged filter can cause the circulation pump to strain and ultimately fail. Clean filters prevent pump problems.
Remove the lower spray arm by unscrewing the center nut counterclockwise and lifting it off. Check that all spray holes are clear.

Use a toothpick to clear any clogged holes. A clogged spray arm reduces water flow and overloads the circulation pump.
Power cycle the dishwasher by turning off the circuit breaker for 5 minutes.

If the F12 was caused by a jammed impeller that has since cleared itself, a power reset may allow the pump motor to try starting again.
If F12 persists after cleaning and resetting, the circulation pump motor needs professional inspection or replacement.

A technician can test the motor for proper resistance and voltage, confirming whether it needs replacement before any parts are ordered.

When to Call a Professional

The circulation pump is the most expensive component to repair in a dishwasher. A new circulation pump assembly costs $80 to $160. Professional replacement including labor typically costs $180 to $280. For dishwashers over 8 years old, compare the repair cost to buying a new unit.

Frequently Asked Questions

What is the difference between the circulation pump and the drain pump?

The circulation pump pushes water through the spray arms to wash your dishes — it runs during the wash and rinse cycles. The drain pump removes dirty water from the tub after washing. They are separate motors. F12 is specifically about the circulation pump, while F11 is about the drain pump.

How can I tell if the circulation pump is jammed versus burned out?

If you hear a humming sound from the dishwasher but no water spraying, the pump motor may be trying to run but is jammed. If you hear nothing at all when the dishwasher should be washing, the motor may have burned out. A jammed pump can sometimes be freed by removing the obstruction; a burned-out motor needs replacement.

Should I repair or replace a dishwasher with F12?

If your dishwasher is less than 8 years old and in otherwise good condition, repair is usually worth it. Circulation pump replacement at $180 to $280 is significant but less than a new dishwasher at $400 to $800+. If the dishwasher is older or has had multiple repairs, replacement may be the smarter choice.