P6 — High or low pressure switch open

What does P6 mean?

The system's high or low pressure switch has been activated, indicating a potentially unsafe pressure level within the refrigerant system.

• Incorrect refrigerant charge (too high or too low)
• Blocked refrigerant lines
• Malfunctioning pressure sensors or switches
• Dirty indoor or outdoor coils

Click steps to track your progress.

1. 1

   Ensure air filters are clean and airflow is not restricted.

2. 2

   Check for obstructions in the refrigerant lines.

3. 3

   Verify the pressure readings (requires specialized tools and knowledge).

4. 4

   A technician should inspect refrigerant charge and system pressures.