Error code · Room Air Conditioner

LG Air Conditioner Code CH07: Conflicting Modes

CH07 appears on LG 2-in-1 and ceiling-type air conditioners that serve more than one room or indoor unit. It means a standing unit and a wall unit, or two rooms, are set to conflicting modes: one…

Low risk · DIY check OK

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Code: CH07
Appliance: Room Air Conditioner
Brand: LG
Warranty: 30-day workmanship

What CH07 means

CH07 appears on LG 2-in-1 and ceiling-type air conditioners that serve more than one room or indoor unit. It means a standing unit and a wall unit, or two rooms, are set to conflicting modes: one wants heating while the other wants cooling or dehumidification. Units on a shared outdoor system cannot do both at once. The owner sees CH07 on the display, and one of the units may refuse to start or change mode until the settings agree.

Common causes of CH07

One indoor unit set to heating while another is set to cooling
One unit in dehumidification mode while another heats
Mode changed from a different room's remote

✓ One safe check you can try

1. Look at the mode on every indoor unit connected to the system. 2. Set them all to heating, or set them all to cooling or dehumidification. 3. Wait a minute and see whether CH07 clears. 4. If it stays with matching modes, leave the system off and arrange service.

! Why to stop there

If CH07 stays with all units on the same mode, we test the mode logic and indoor unit communication.
We check which unit last changed the mode and whether the setting sticks.
We quote the repair in writing before starting any work.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Room Air Conditioner codes

LED Too BrightLG Air Conditioner LED Too Bright: Remote Brightness Control LoLG Air Conditioner Message Lo: Low Room Temperature "Outdoor Unit" MessageLG Air Conditioner "Outdoor Unit" Message: Status Display SP, CP, POLG Air Conditioner Codes SP, CP, PO: Power Cooling Mode HiLG Air Conditioner Message Hi: High Room Temperature Lamp Does Not LightLG Air Conditioner Lamp Off After Shutdown: Filter Alarm Timing LED Blinking After Power OffLG Air Conditioner LED Blinking After Power Off: Auto Drying F1, F2, F3LG Air Conditioner Codes F1, F2, F3: Fan Speed Readout

CH07CH07 questions

Why can't one unit heat while another cools?

Units that share an outdoor system run in one direction at a time. When two settings clash, the system shows CH07 until every indoor unit agrees on the mode.

Is CH07 a sign something broke?

Usually not. It is a setting conflict between rooms, and matching the modes across every indoor unit normally clears it without any repair or parts.

Does dehumidification count as cooling?

Yes, for this code. Cooling and dehumidification can run together on the same system, while heating is the mode that conflicts with both of them.

Book a visit

Still unsure about CH07?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 597-5662