ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner CA error code

Difficulty: Hard · Cost: $80–$250 · Duration: Requires professional service

The CA error means your Daikin air conditioner detected a fault with the discharge air thermistor — the sensor that measures the temperature of the air being discharged from the indoor unit. Contact a qualified technician to test and replace the thermistor.

Common causes

  • Defective thermistor for discharge air
  • Defective indoor unit PCB
  • Defective connector contact

How to fix it

  1. 1

    Contact a qualified technician to inspect and replace the discharge air thermistor

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