Compressor overheat (110°C) — RUN LED flashes 4 times, TIMER LED flashes 2 times

What does 42 mean?

The compressor has overheated to 110°C, triggering a protective shutdown. This usually indicates an issue with the refrigerant flow, the electronic expansion valve, or the compressor itself.

• Service valve is closed or partially obstructed
• Electronic expansion valve is faulty
• Compressor is faulty

Click steps to track your progress.

1. 1

   Ensure all service valves on the unit are fully open.

2. 2

   Allow the unit to cool down for a significant period before attempting to restart.

3. 3

   If the overheating recurs, the electronic expansion valve or the compressor may be faulty and should be checked by a qualified technician.