F6 — High pressure control activated (in cooling)

What does F6 mean?

This code means that during cooling operation, the system's internal pressure has become too high, activating a safety protection.

• Blocked airflow
• Low outdoor temperature during cooling
• Refrigerant overcharge

Click steps to track your progress.

1. 1

   Check for any obstructions blocking airflow to the indoor or outdoor unit.

2. 2

   Ensure the outdoor unit is operating in appropriate ambient temperatures for cooling.

3. 3

   A technician should check the refrigerant charge and system pressures.