LG CH 238 error code

What it means

LG explains that post-2021 models can display three-digit CH codes in sequence, such as CH 238. CH 238 points to an indoor/outdoor connection problem and can also occur when the outdoor unit has no power.

Urgency

Likely causes

1. Connection problem between the indoor and outdoor units
2. Outdoor unit power not supplied
3. Outdoor unit power plug disconnected
4. Air-conditioner breaker switched off

Homeowner fix

If your model has an outdoor-unit power plug, make sure it is connected directly to a wall outlet. Check that the air-conditioner breaker is on. If the breaker will not stay on, do not keep trying.

When to call a pro

Call a licensed HVAC technician if CH 238 remains after power checks or appeared after installation. Tell them LG links CH 238 to indoor/outdoor connection and outdoor power supply.

Repair vs replace

A power or connection correction is usually repairable. Compare replacement only if an older system needs major board or wiring repairs.

• 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: verify separate indoor/outdoor power on post-2021 models, outdoor supply, breaker status, and indoor/outdoor connection diagnostics. 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 two hundred thirty eight 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