ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner F3 error code

Difficulty: Hard · Cost: $150–$500 · Duration: Requires professional service

The F3 error means your Daikin air conditioner detected an abnormal temperature in the compressor discharge pipe — the pipe that carries high-temperature, high-pressure refrigerant from the compressor. This can indicate a refrigerant shortage, a blocked system, or a defective thermistor. Contact a qualified technician.

Common causes

  • Discharge pipe thermistor is defective
  • Discharge pipe temperature is genuinely abnormal due to refrigerant shortage or blockage
  • Outdoor unit control PCB has a fault

How to fix it

  1. 1

    Contact a qualified technician to inspect the discharge pipe thermistor and refrigerant system

Related Daikin Air Conditioner error codes

1

A0

An external protection device connected to the indoor unit has been activated

hard
2

A1

A fault was detected in the indoor unit PCB (control board)

hard
3

A3

The drain level control system has detected an abnormality — drain may be clogged

medium
4

A5

Freeze-up protection (cooling) or high pressure control (heating) has activated — check the air filter

easy