F31 -02 — High pressure shutdown

What does F31 -02 mean?

The system has detected excessively high pressure. This can be caused by several factors hindering the refrigerant flow.

• Blockage in the refrigerant lines or expansion valve.
• Dirty outdoor unit heat exchanger.
• High condensing pressure due to poor airflow.
• Overcharged refrigerant.

Click steps to track your progress.

1. 1

   Clean the outdoor unit's heat exchanger.

2. 2

   Ensure adequate airflow around the outdoor unit.

3. 3

   Check for blockages in refrigerant lines.

4. 4

   Verify correct refrigerant charge level (professional service recommended).

5. 5

   Turn off the unit, unplug it, wait 30 seconds, and plug it back in to reset.