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Error code reference
Kenmore Washer Error Code F40
Steamer communication failure - incorrect or corrupted communication between CCU and steamer electronic board.
SourceKenmore Washer - Tech Sheet: Diagnostic & Service Guide (46752700)p. 6
Diagnostic procedure
The full F40 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
Check harness on steamer electronic board and check for loose connectors.
SourceKenmore Washer - Tech Sheet: Diagnostic & Service Guide (46752700)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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Where this code is documented
8 manuals in the MyPros+ library document this code for Kenmore washer.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
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