Error 443 - Operation prohibited due to pressure drop

What does 443 mean?

The unit's operation is prohibited because a significant pressure drop has been detected in the system, indicating a potential problem with refrigerant flow or leakage.

• Refrigerant leakage
• Blocked filter drier or refrigerant line restriction
• Faulty expansion valve
• Pressure sensor issue

Click steps to track your progress.

1. 1

   Check for any signs of refrigerant leaks around the outdoor unit and piping.

2. 2

   Inspect the system for any visible blockages in refrigerant lines.

3. 3

   If the problem persists, contact a qualified technician to diagnose the pressure system and refrigerant circuit.