Wine cooler displays E12 and the interior temperature overshoots or undershoots the setpoint significantly.

Safety first: Unplug the unit before accessing any internal electronics.

Steps to attempt correction:

• 1. Verify with an external thermometer: Place a reliable digital thermometer in the center of the cabinet and compare actual temperature to the display. Note any large discrepancy.
• 2. Power reset: Disconnect power for 10–15 minutes to allow the control to fully reset. Restore power and monitor temperatures for several hours.
• 3. Check sensors: Inspect and test cabinet and evaporator sensors (NTCs) for correct resistance at known temperatures. Replace any sensor that is out of specification.
• 4. Look for service mode options: Some Viking models allow limited temperature offset calibration via service mode. Refer to the service manual; if available, perform a calibration following Viking’s procedure.
• 5. Replace control board if needed: If sensors are good and calibration cannot be corrected, the main control board’s calibration data or ADC circuitry may be faulty. Replace the board.

Note: Calibration and service mode procedures vary by model; if you do not have access to the correct documentation, contact Viking support or a professional technician.