LG Air Conditioner Error Code 101

Error code 101 on an LG air conditioner means the system has shut down because the discharge temperature of constant speed compressor 2 in the sub1 outdoor unit exceeded the safe operating limit. This is a protective shutdown designed to prevent compressor damage. The first step in diagnosing this code is confirming that the refrigerant charge is at the correct level. A certified HVAC technician is typically needed to properly assess and resolve this fault.

No. The system has already shut itself down as a safety measure, which means continuing to force it to operate could result in permanent compressor damage. Running a compressor with abnormally high discharge temperatures can degrade compressor oil, damage internal valves, and lead to complete compressor failure. Leave the unit off until the underlying cause has been diagnosed and corrected.

Repair costs vary depending on the cause. A refrigerant recharge can range from around 150 to 500 dollars depending on the refrigerant type and amount needed. Replacing a condenser fan motor typically costs between 200 and 600 dollars including labor. If the compressor itself has been damaged, replacement costs can range from 800 to over 2,000 dollars, making early diagnosis important to avoid escalating the repair.

Some contributing factors, such as cleaning a dirty condenser coil or clearing debris blocking airflow around the outdoor unit, can be addressed by a homeowner. However, checking refrigerant levels, identifying circuit restrictions, and testing compressor discharge sensors require specialized tools and EPA certification for refrigerant handling. Most repairs for this code will require a qualified technician.

A power reset may temporarily clear the fault and allow the unit to restart, but the error will return if the root cause has not been fixed. Because this code reflects a real hardware condition such as low refrigerant or restricted airflow, resetting without repair is not a solution and may lead to more serious damage over time.