How to Fix / Troubleshooting

Safety: Unplug the unit before handling wiring or circuit boards.

Note when error occurs: Observe if the error appears during compressor start, door opening, or randomly. This can help identify vibration- or moisture-related issues.
Check all sensor connections: Inspect and reseat connectors for the cabinet, evaporator, and ambient thermistors on the main control board.
Secure wiring harnesses: Ensure harnesses are clipped and tied away from vibrating components like the compressor and fans.
Use surge protection: Plug the wine cooler into a quality surge protector to reduce future control glitches caused by power spikes.
Monitor operation: If the error becomes more frequent or cooling is affected, replace the main control board to prevent complete failure.

Wine cooler intermittently displays 'Er' or 'ERR' and beeps, but continues to run.

Possible Causes