Wine cooler displays H1 and stops cooling; may indicate high temperature or sensor over-range.

Safety: Disconnect power before testing sensors or boards.

Checks:

• Verify ambient temperature: Ensure the cooler is not installed in a location exceeding the manufacturer's maximum ambient temperature (often around 32–38°C).
• Inspect sensor routing: Access the interior rear panel and locate the cabinet sensor. Confirm its wiring is not touching hot components like the condenser line or compressor discharge tube.
• Test sensor: Measure resistance at room temperature and compare to expected NTC values. A very low resistance (near short) can cause an H1 error. Replace the sensor if readings are abnormal.
• Check for wiring shorts: Inspect the harness for melted insulation or contact with metal edges that could short the wires.
• Replace main PCB: If the sensor and wiring are correct but H1 persists, the control board may be misreading the sensor and should be replaced.