Skip to main contentStart diagnosing F20 on your Whirlpool washer
What this code means
Long Fill - Water level does not change for a period of time, or water is present but main control does not detect the water level changing.. Possible causes: Water supply not connected or turned on; Low water pressure; Plugged hose screens; Improper drain hose installation; Water siphoning from drain hose; Pinched or leaking pressure hose; Pressure transducer hose issue
Next steps: diagnose the root cause
1
Verify the error code is active
Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.
2
Get the full diagnostic procedure
Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.
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Access Whirlpool washer service manuals, wiring schematics, exploded parts views, and error code references on MyPros+.