LG CH 29 error code

What it means

CH 29 means compressor current is abnormally high. LG lists causes involving refrigerant amount or flow and outdoor ventilation, so homeowners should only correct safe airflow issues and then stop if the code returns.

Urgency

Likely causes

1. Compressor current abnormally high
2. Too much refrigerant charge
3. Refrigerant flow obstructed
4. Outdoor unit ventilation not proper

Homeowner fix

Turn the system off, then clear leaves, snow, or stored items around the outdoor unit without opening panels. Power cycle once if safe. If CH 29 returns, stop using the system.

When to call a pro

Call a licensed HVAC technician if CH 29 returns. Tell them LG identifies CH 29 as outdoor inverter compressor overcurrent with refrigerant-flow or outdoor-ventilation causes.

Repair vs replace

Ventilation problems may be low-cost. If diagnosis points to refrigerant-circuit, inverter, or compressor repair 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: verify outdoor airflow, compressor current, refrigerant charge/flow, inverter output, and compressor condition. 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 nine 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