F3 — High temperature discharge pipe control activated

What does F3 mean?

This code indicates that the discharge pipe temperature has become too high, triggering a safety control. This often relates to airflow or system load.

• Blocked airflow (indoor or outdoor unit)
• Low refrigerant level
• System operating under excessive load

Click steps to track your progress.

1. 1

   Ensure that air filters are clean and that air inlets/outlets are not blocked.

2. 2

   Check for obstructions around the outdoor unit's fan and coils.

3. 3

   Contact a service professional to inspect refrigerant levels and system operation.