Haier · Air Conditioning
The system's internal pressure has exceeded a safe maximum level. This could be due to restricted airflow, too much refrigerant, or other system blockages.
Click steps to track your progress.
Ensure air filters are clean and vents are not blocked.
Check that the outdoor unit's fan is operating correctly.
Restart the air conditioner.
If the protection trips frequently, a technician should check refrigerant levels and system pressure.