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Error code reference
Kenmore Oven Error Code F43
The microwave external cooling fan speed (as read by the tachometer input of the Appliance Control Board) is abnormally slow.
SourceKenmore Frigidaire Oven - Tech Sheet: Electronic Control Board (790 Series)p. 18
Diagnostic procedure
The full F43 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 if the microwave external cooling fan is turning. If not turning or very slow, check 120VAC voltage at the fan.
SourceKenmore Frigidaire Oven - Tech Sheet: Electronic Control Board (790 Series)p. 18
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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