Wine cooler shows E14 and interior temperature overshoots setpoint or cycles erratically

Safety: Unplug the unit before testing the heater or thermostat. The heater can be sharp and hot after operation.

E14 indicates a defrost system malfunction.

• Step 1 – Inspect evaporator: Remove the interior rear panel and check for heavy frost or ice covering the evaporator coil.
• Step 2 – Test heater: With the unit unplugged, disconnect the defrost heater leads and measure resistance. An open circuit indicates a failed heater.
• Step 3 – Check defrost thermostat: Locate the thermostat or thermal fuse clipped to the evaporator tubing. Test for continuity when the thermostat is cold (frosted). No continuity indicates a failed thermostat or fuse.
• Step 4 – Replace failed components: Replace the defrost heater and/or thermostat as needed, using KitchenAid-approved parts. Ensure they are securely clipped to the evaporator.
• Step 5 – Control board: If heater and thermostat are good but defrost never occurs and E14 persists, the main control board defrost relay or logic may be defective and should be replaced by a technician.