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Error code reference
Frigidaire Microwave Error Code LOCK
Indicates the Child Lock feature is active and the control panel is deactivated; displayed when any pad is touched while locked.
SourceFrigidaire Over-the-Range Microwave - Use & Care Manual (FMV156 Series)p. 12
Diagnostic procedure
The full LOCK 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
To cancel, touch Timer/Clock, the number 1 and Clear/Off pad.
SourceFrigidaire Over-the-Range Microwave - Use & Care Manual (FMV156 Series)p. 12
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock LOCK procedure $9.95
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