LG Air Conditioner Error Code 33

Error code 33 means the discharge temperature of the constant speed compressor at the main outdoor unit has risen to an excessively high level. The system shuts itself off automatically to protect the compressor from damage. Diagnosis involves checking the refrigerant charge, discharge temperature sensor, liquid expansion valve, and liquid injection circuit.

No. The system has already shut itself off as a protective measure, and attempting to force it back into operation without addressing the root cause risks serious compressor damage. The compressor is one of the most expensive components in the system, so allowing repeated overtemperature events can lead to a full compressor failure.

A power reset may temporarily clear the fault and allow the unit to restart, but if the underlying cause has not been corrected, the discharge temperature will rise again and the system will shut down and display the error code once more. Repeated resets without repair can accelerate compressor wear. The fault should be properly diagnosed and repaired before returning the unit to normal service.

Some checks, like inspecting the outdoor unit for airflow obstructions or debris blocking the condenser coil, can be performed by a knowledgeable homeowner. However, checking refrigerant pressure, testing the discharge temperature sensor, and inspecting the LEV and liquid injection components all require specialized tools and refrigerant handling certification. A qualified HVAC technician should perform the full CH32 diagnostic procedure.

Repair costs vary widely depending on the root cause. A refrigerant recharge combined with leak repair can range from a few hundred dollars to over a thousand dollars depending on refrigerant type and leak location. Replacing a discharge temperature sensor is typically less expensive, while a failed LEV or compressor repair will be at the higher end of the cost spectrum. A diagnostic visit from a technician is the best way to get an accurate estimate.