LG air conditioner CH10 code: fan motor fault (mini-split and window)

LG says CH10 points to a problem with the indoor or outdoor fan motor on split and window units. Debris such as leaves or snow jamming the fan is the easy fix. Otherwise the fan motor, its wiring or the control board has failed.

Likely causes

Listed from most to least common.

1. Leaves, snow, ice or other debris blocking the fan
2. Fan blade or blower wheel rubbing or loose
3. Fan motor failed
4. Loose wiring to the fan motor
5. Control board fault

How to fix the CH10 code

Unplug the air conditioner or switch it off at the breaker before removing any panel or filter.

1. 1

   Step 1: Turn off the power

   Switch off the breaker, or unplug a window unit, before looking at any fan.

2. 2

   Step 2: Clear the fan

   Check the outdoor fan grille, or the back of a window unit, for leaves, snow or ice. Wearing gloves, remove anything you can reach without taking panels off.

3. 3

   Step 3: Reset the power

   Wait about 5 minutes, then restore power and start the unit. Listen for the fan starting.

You'll need: Work gloves, flashlight.

When to call a technician

If CH10 returns after a reset with the fan clear, have a technician test the fan motor and control board. Do not open the unit's panels yourself.

A typical repair for this code costs $200–$650 in the US, including parts and labor. Prices vary by area and model.

Models this applies to

• Ductless mini-splits (wall-mounted and Art Cool)
• Multi-zone mini-split systems
• Window air conditioners
• Portable air conditioners

Codes can differ slightly between models. Your owner's manual is the final word and is available from LG support.

Common questions