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Error code reference
Whirlpool Microwave Error Code F1E3-0
ACU Relay Failure - relay on ACU board has failed.
SourceWhirlpool Microwave - Tech Sheet: Service Diagnostics & Error Codes (W11739870)p. 3
Diagnostic procedure
The full F1E3-0 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
Replace the cable between ACU and HMI. Replace ACU. Plug in microwave oven or reconnect power.
SourceWhirlpool Microwave - Tech Sheet: Service Diagnostics & Error Codes (W11739870)p. 3
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
4 manuals in the MyPros+ library document this code for Whirlpool microwave.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
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