Error code reference

Kenmore Range Error Code 21

LIN (Local Interconnect Network) error: no communications or shorted bus.

SourceKenmore Frigidaire Range 790 - Tech Sheet: ES575 Electronic Oven Controlp. 6

Diagnostic procedure

The full 21 procedure

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MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

Verify the LIN Bus communication harness at ESEC-UIB, P9 connector is well connected and not damaged.

SourceKenmore Frigidaire Range 790 - Tech Sheet: ES575 Electronic Oven Controlp. 6

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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

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

Models covered by the manuals that document this code

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The full 21 procedure

Where this code is documented

Models covered by the manuals that document this code

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