WHIRLPOOL DUET WASHER F21 Error Symptom

Drain Pump Assembly

The drain pump utilizes a synchronous motor to drive a centrifugal impeller. If the motor's magnetic rotor becomes desynchronized due to debris or internal winding failure, the pump loses the ability to overcome the static head of the drain hose. Replacing the assembly restores the necessary flow rate to meet the CCU's programmed timeout parameters.

SKU: WPW10730972

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Drain Pump Debris Filter

The debris filter is designed to protect the impeller by trapping coins, lint, and foreign objects. If the filter becomes saturated with particulate matter, it creates a massive pressure drop in the suction line, preventing the pump from moving water regardless of motor health.

SKU: W10321504

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Water Level Pressure Switch

This component acts as a pneumatic-to-electric transducer. If the internal diaphragm or the air tube leading to the switch is obstructed or damaged, the switch may remain in the 'Full' position despite a successful drain, leading the CCU to incorrectly trigger the F21 fault code.

SKU: WPW10448876

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