Error code reference

Kenmore Oven Error Code F21

Communication problem between the User Interface Board and the Appliance Control Board: the User Interface Board is no longer able to detect communication from the Appliance Control Board.

SourceKenmore Frigidaire Oven - Tech Sheet: Electronic Control Board (790 Series)p. 17

Kenmore codes Kenmore oven codes

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.

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First diagnostic step

Check the communication harness from connector P20 (pins 1,2,7,9,11) on the Appliance Control Board to connector J2 on the User Interface Board.

SourceKenmore Frigidaire Oven - Tech Sheet: Electronic Control Board (790 Series)p. 17

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Where this code is documented

1 manual in the MyPros+ library documents this code for Kenmore oven.

Models covered by the manuals that document this code

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The full F21 procedure

Where this code is documented

Models covered by the manuals that document this code

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