LG Air Conditioner Error Code 213

Error code 213 on an LG air conditioner indicates a liquid pipe temperature sensor fault on HR unit 4. The system has detected either an open circuit or a short circuit in the sensor or its lead cable. This prevents the unit from accurately monitoring refrigerant temperatures, so it shuts down as a protective measure. A technician needs to inspect the sensor connection, wiring, and sensor element to resolve the fault.

No. Error code 213 causes the system to shut down precisely because it cannot safely monitor liquid pipe temperatures without an accurate sensor reading. Attempting to bypass or override the fault and continue operating the unit could result in undetected refrigerant or thermal conditions that damage compressors or other components. The system should remain off until the fault is resolved.

A power reset may temporarily clear the error and allow the unit to restart, but if the underlying sensor or wiring fault still exists, code 213 will return once the system attempts to read the sensor again. Resetting does not fix the hardware problem. The sensor connection, lead cable, and thermistor resistance all need to be checked and corrected for the error to clear permanently.

Some basic steps, such as checking that the sensor connector is fully seated and free of visible corrosion, can be done without special tools. However, properly diagnosing whether the fault is in the cable, the sensor, or the control board requires a multimeter and familiarity with thermistor resistance testing. Replacing components inside an HR unit also involves working with refrigerant-side components, so a qualified technician is strongly recommended for anything beyond visual inspection.

Repair costs depend on what component has failed. If only the connector needs cleaning or reseating, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a liquid pipe temperature sensor generally runs $100 to $250 including parts and labor. If the control board input circuit has failed, board replacement can cost significantly more, often in the $300 to $600 range or higher depending on the model and parts availability.