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Error code reference
Dacor Oven Error Code C73
Comm error - incorrect board configuration detected (only one power board on double oven, two uppers/lowers connected, or upper/lower switches in wrong state).
SourceDacor Discovery Wall Oven - Full Service Manualp. 9-27
Diagnostic procedure
The full C73 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
Verify communication line connections and board ID switch settings. Correct wiring and switch state issues, then replace relay board if needed, lastly replace logic board.
SourceDacor Discovery Wall Oven - Full Service Manualp. 9-27
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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