Display shows L1 and the cabinet temperature is extremely low; bottles may be frosting or freezing.

Safety: Unplug the unit before accessing internal components.

Steps to address L1:

• Verify setpoint: Confirm that the temperature setting is not accidentally set too low for wine storage.
• Check temperature sensors: Inspect cabinet and evaporator thermistors for damage or incorrect placement. A shorted sensor can make the board think the cabinet is warm, causing overcooling.
• Test sensors: Use a multimeter to verify resistance values. Replace any sensor that reads near 0 Ω or does not change with temperature.
• Inspect control board: Look for signs of burnt components or stuck relays. If the compressor runs continuously even when the set temperature is reached, the compressor relay may be stuck closed.
• Replace faulty parts: Replace defective sensors first. If overcooling continues, replace the main control board with a Whynter-compatible board.

After repair: Monitor the cabinet temperature over 24 hours to ensure it stabilizes within the desired range and that L1 does not reappear.