LG CH 07 error code

What it means

CH 07 appears when connected LG indoor units are not set to compatible modes, such as one unit calling for heat while another calls for cooling or dry operation. The equipment is blocking operation because a shared system cannot heat and cool at the same time.

Urgency

Likely causes

1. One indoor unit set to heating while another is set to cooling
2. One indoor unit set to heating while another is set to dehumidification
3. Different rooms or paired units set to incompatible modes

Homeowner fix

Set every indoor unit on the same outdoor system to cooling, dry, or heating as a group. Fan-only and air-purification modes can be used without the same heat/cool conflict.

When to call a pro

Call for service only if CH 07 stays after all indoor units are set to the same mode and the system is power cycled once.

Repair vs replace

This is normally a mode-setting issue, not a repair-or-replace decision.

• LG Mega R-32 9,000 BTU (115V)

  Mega R-32

• LG Mega R-32 9,000 BTU (230V)

  Mega R-32

• LG Mega R-32 12,000 BTU (115V)

  Mega R-32

• LG Mega R-32 12,000 BTU (230V)

  Mega R-32

For your technician

Technician note: confirm all connected indoor units are assigned correctly and commanded in compatible operating modes before troubleshooting controls. Page context: LG maps this display to the Mega R-32 line; source: LG official support pages: [LG Air Conditioner] Guide to Error Codes; [LG Air Conditioner] How to Check Air Conditioner Error Codes; LG status-display help articles; LG Korea [LG Air Conditioner] Air conditioner error inquiry cross-check; display convention: match the letter C, letter H, and seven marker exactly before comparing neighboring codes.

Which systems show it

Mega R-32

Related troubleshooting

Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.

Related codes

Source

Next step