ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner C1 error code

Difficulty: Hard · Cost: $80–$300 · Duration: Requires professional service

The C1 error means your Daikin air conditioner detected a communication failure between the indoor unit main PCB and its sub PCB. This is caused by a defective connector connection between the two boards. Contact a qualified technician to inspect and reseat the PCB connector.

Common causes

  • Defective connection of the connector between the indoor unit PCB and sub PCB

How to fix it

  1. 1

    Contact a qualified technician to inspect and reseat the connector between the indoor unit PCB and sub PCB

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