CH10 - The indoor unit fan has a fault or is not operating normally.
LG says CH10 and E6 are caused by problems with the indoor unit fan. LG recommends checking for debris or snow buildup around the fan components before requesting service if nothing visible is blocking operation.
Based on LG USA support articles for wall-mounted and related inverter split air conditioners; exact indicators and alternate code labels can vary by model.
Severity
High
Display
The fault may appear as CH10 or E6 depending on model.
Support first?
Often not
Models in range
Wall-mounted inverter split air conditioners, 2-in-1 heating and cooling air conditioners
What to do first
Start with these checks
- 1Turn the unit off before checking for visible debris around accessible air inlets and outlets.
- 2Clear only obvious external debris or snow that LG identifies as a possible cause.
- 3If nothing visible is wrong, stop and arrange service.
Likely causes
What usually sits behind this code
Indoor fan problem.
Debris blocking the indoor fan area.
Snow or ice buildup affecting airflow or fan rotation in relevant conditions.
Contact support
Contact customer support if any of these apply
- !CH10 or E6 remains after visible obstructions are cleared.
- !There is no obvious debris or snow but the fault remains.
- !The indoor fan does not sound or feel like it is running normally.
- - LG pairs CH10 and E6 with indoor-fan issues.
- - LG pairs CH67 and EF with outdoor-fan issues.
Related codes
Nearby codes in this family
More ranges
More LG air-conditioner ranges
Source notes
Source and scope
Source: LG USA Support
LG says CH10 or E6 indicates an indoor fan issue and advises checking for debris or snow before requesting service.
Last reviewed: 2026-04-19
Do not disassemble the indoor unit or reach into fan assemblies. Only remove clearly visible external blockage.