High-pressure control (in cooling mode) — Excessive system pressure

What does High-pressure control (in cooling mode) mean?

This error means the system pressure has become too high while in cooling mode. This can be caused by issues restricting refrigerant flow or heat dissipation.

• Blocked airflow to the outdoor unit coil
• Dirty outdoor unit coil
• Low outdoor fan speed
• Overcharge of refrigerant

Click steps to track your progress.

1. 1

   Ensure the outdoor unit's surroundings are clear of obstructions (plants, debris).

2. 2

   Clean the outdoor unit's coil if it appears dirty.

3. 3

   Turn off the unit, wait 10 minutes, and then turn it back on.

4. 4

   If the issue persists, contact a qualified installer.