Error 44 — System high pressure detected

What does 44 mean?

The system is operating at excessive refrigerant pressure. This could be due to overcharge, a dirty coil, or a restriction.

• Refrigerant overcharge
• Blocked liquid line piping
• Dirty outdoor coil
• Outdoor unit cannot be turned on normally due to failure to open electronic expansion valve
• Operation environment is beyond the allowed range

Click steps to track your progress.

1. 1

   Check the refrigerant charge; ensure it's not overcharged.

2. 2

   Clean the outdoor coil.

3. 3

   Inspect the liquid line piping for blockages.

4. 4

   Verify the electronic expansion valve is functioning correctly.

5. 5

   Ensure the operating environment is within the allowed range.