What the Kenmore Dishwasher F12 Error Code Means
The F12 error code signals an internal fault within the main control board itself. Unlike F11 (a communication error between boards), F12 indicates the primary board has detected an internal failure in one of its own circuits — often a relay, capacitor, or processor fault.
Common Causes
- Power surge or lightning strike damaging the PCB
- Moisture intrusion onto the control board
- Blown capacitor or failed relay on the main board
- Firmware corruption (rare, but possible after power interruptions)
Immediate Steps
- Unplug the dishwasher or turn off the breaker for at least 10 minutes to allow the board to fully discharge.
- Reconnect power and attempt to start a new cycle — some F12 codes are transient and clear after a full reset.
- Check for any burning smell near the control panel area, which would indicate physical board damage.
Repair Options
If the F12 persists after a full power cycle, the main control board requires either component-level repair or full replacement. Our certified technicians source factory-matched control boards for your specific Kenmore model and install them with a 90-day parts and labor warranty. Attempting to repair a PCB at home without electronics expertise risks further damage.