LG · Air conditioner
CH05
Code guidance
Indoor/outdoor communication issue
This code can be associated with communication between the indoor and outdoor units.
Service recommended
Request LG service if the same code returns.
Possible meaning
This code can be associated with communication between the indoor and outdoor units.
This information is not a professional diagnosis or repair instruction. The same code can mean different things by model, so follow the product manual and official manufacturer guidance first.
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Official manufacturer sourceVerify with official guidance ↗Official source checked: 2026-08-21