ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner A1 error code

Difficulty: Hard · Cost: $150–$400 · Duration: Requires professional service

The A1 error means your Daikin air conditioner detected a fault with the indoor unit's main PCB (printed circuit board). This can also be caused by external electrical noise. Contact a qualified technician to inspect and replace the indoor unit PCB if required.

Common causes

  • Indoor unit PCB has malfunctioned or failed
  • External electrical noise or interference affecting the PCB

How to fix it

  1. 1

    Contact a qualified technician to inspect and replace the indoor unit PCB if required

Related Daikin Air Conditioner error codes

1

A0

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

hard
2

A3

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

medium
3

A5

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

easy
4

A6

The indoor unit fan motor has a fault

hard