Error code reference

Whirlpool Washer Error Code F21

Excessive drain time; drain operation exceeds 8 minutes without reaching the pressure switch reset threshold. Excess suds indicated by alternating 'SudS' display and countdown.

SourceWhirlpool Commercial Front-Load Washer - Tech Sheet: Basic Operations (CHW8990C)p. 6

Diagnostic procedure

The full F21 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Clear the error code, disconnect power, verify drain hose is not forced into standpipe, check drain height does not exceed 2.4 m (8 ft), inspect drain hose for obstructions or kinks, inspect drain pump and remove foreign objects, check electrical connection between pump and CCU (DP2).

SourceWhirlpool Commercial Front-Load Washer - Tech Sheet: Basic Operations (CHW8990C)p. 6

More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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