Frigidaire Dishwasher Error Code E:21

The E:21 code means the dishwasher's heat pump is blocked or clogged and cannot operate normally. The heat pump is a key component in the drying system, and when its impeller is obstructed, the control board triggers this fault. The fix usually involves clearing debris from the pump area, or replacing the pump if the impeller is physically stuck or damaged.

A reset may temporarily clear the code from the display, but if the underlying blockage or pump failure is not addressed, the E:21 error will return once the dishwasher attempts to run again. You need to physically inspect and resolve the heat pump obstruction for the fix to be permanent.

If the issue is simply a debris blockage, the repair can be done at no parts cost, though a service call fee may apply if you use a technician. If the heat pump assembly needs to be replaced, parts and labor costs typically range from $150 to $400 depending on your location and the specific model. Addressing the issue early helps avoid additional damage that could increase repair costs.

Start by removing the lower spray arm and filter assembly to access the heat pump area, then clear any debris or obstructions you find. Once the area is clean, check that the impeller spins freely. If the impeller is still stuck after cleaning, the heat pump assembly will need to be replaced to clear the error.

It is not recommended to continue running the dishwasher while E:21 is active. A blocked or seized heat pump can cause the motor to overheat and may lead to further mechanical damage. Resolving the blockage before running additional cycles will prevent more costly repairs.