ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner L3 error code

Difficulty: Medium · Cost: $0–$400 · Duration: 15–20m

The L3 error means your Daikin air conditioner detected that the temperature inside the outdoor unit electrical component box rose abnormally. This can be caused by short-circuit airflow around the outdoor unit, a defective outdoor unit fan motor, a defective power transistor, or a defective outdoor unit PCB. Make sure the outdoor unit has adequate clearance. If the error persists contact a qualified technician.

Common causes

  • Short-circuit airflow around the outdoor unit reducing cooling of the electrical box
  • Defective outdoor unit fan motor
  • Defective power transistor
  • Defective outdoor unit PCB

How to fix it

  1. 1

    Turn off the air conditioner and allow the outdoor unit to cool

  2. 2

    Check that the outdoor unit has adequate clearance on all sides and remove any objects blocking airflow

  3. 3

    If the error returns contact a qualified technician to inspect the fan motor and electrical components

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