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F0

F0 - Abnormal high pressure actuation of HPS

Daikin · Air Conditioning

What does F0 mean?

The high-pressure switch (HPS) has activated due to excessively high system pressure.

Common Causes

  • Refrigerant overcharge
  • Blocked airflow
  • Outdoor unit fan not working

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Clear any obstructions from indoor and outdoor unit air vents.

  2. 2

    Clean or replace air filters.

  3. 3

    A service professional is needed to adjust refrigerant levels and check the HPS.

Browse all codes in this manual (79)
Verified technical data. Last updated: April 2026

Related Faults

A0A0 - External protection activeA1A1 - Indoor PCB failureA2A2 - Malfunction of freezing protection
Source: Daikin Air Conditioning
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