LG Air Conditioner Error Code 193

Error code 193 means the fan PCB heatsink temperature has exceeded 95°C, which is the system's protective upper limit. The unit shuts down to prevent damage to the fan circuit board components. The fault can be caused by a displaced or failed heatsink temperature sensor, or by actual overheating due to restricted airflow or a fan problem.

No, you should not continue operating the unit while error code 193 is active. The code indicates the fan PCB heatsink has reached a potentially damaging temperature, and the system has triggered a protective shutdown for this reason. Forcing the unit to run under these conditions risks permanent damage to the fan PCB and associated components.

If the fix is simply reseating the sensor connector or re-attaching the sensor to the heatsink, there may be no parts cost involved, though a service call fee would apply. Replacing a failed heatsink temperature sensor is generally an inexpensive repair, with parts typically in the range of $10 to $50 depending on the model. If the fan PCB itself has sustained heat damage and requires replacement, costs can rise considerably, generally falling in the range of $150 to $400 or more for parts and labor.

Start by checking that the heatsink temperature sensor is firmly attached to the heatsink surface and that its connector is fully seated on the fan PCB. Measure the sensor's resistance at room temperature; it should read approximately 10kΩ at 25°C within a 5% tolerance. If the sensor tests correctly, inspect the heatsink for dust or debris buildup and confirm the fan motor is running at proper speed. A sensor reading outside specification requires sensor replacement, and persistent genuine overheating may indicate a fan motor or PCB issue requiring a technician.

A power reset may temporarily clear the fault and allow the unit to restart, but the code will return if the underlying cause is not corrected. If the sensor is loose or its connector is unseated, reseating it may resolve the issue permanently. If the sensor is defective or a genuine thermal problem exists, the error code will recur until those conditions are addressed.