LG CH 24 error code

What it means

CH 24 means the outdoor unit is reporting a high-pressure-switch issue. LG's support table lists either an outdoor pressure-switch fault or switch operation from overload.

Urgency

Likely causes

1. Outdoor pressure switch failure
2. High-pressure switch operation due to overload
3. Temporary operation error

Homeowner fix

Turn the system off and make sure the outdoor unit is not blocked by loose debris, snow, or stored items. Power cycle once if safe. If CH 24 returns, leave it off.

When to call a pro

Call a licensed HVAC technician if CH 24 returns. Tell them LG identifies CH 24 as outdoor high-pressure switch operation or pressure-switch failure.

Repair vs replace

A pressure switch or airflow problem may be repairable. If diagnosis points to refrigerant-circuit or compressor issues on older equipment, compare repair with replacement.

• 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: check high-pressure switch circuit, overload causes, outdoor airflow, refrigerant operating pressures, and control inputs. 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 twenty four 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