LG Air Conditioner Error Code 44

Error code 44 indicates a fault with the outdoor unit air temperature sensor. The control board has detected either an open circuit or a short circuit in the sensor, meaning the system cannot read the outdoor ambient temperature. LG air conditioners log this code to protect the compressor from operating under unknown or extreme conditions. The unit will not function normally until the fault is resolved.

It is not recommended to continue running the system while error code 44 is active. Without a valid outdoor temperature reading, the control board cannot properly manage compressor operation or defrost cycles, which can lead to compressor stress or other component damage over time. Addressing the fault promptly helps avoid more costly repairs.

A power reset may temporarily clear the code and allow the unit to attempt operation again, but the code will return if the underlying sensor fault still exists. Resetting should only be used as part of diagnosis to confirm whether the fault is persistent or intermittent. The sensor connection and resistance should be inspected and confirmed within spec before relying on a reset as a solution.

A knowledgeable DIYer can check whether the sensor connector is properly seated on the outdoor PCB and visually inspect the wiring harness for obvious damage. Measuring the sensor's resistance with a multimeter is also a straightforward task if you have basic electrical skills. However, if the sensor needs replacement or the outdoor PCB is suspect, comfort with electrical components and proper safety precautions are necessary, and some may prefer a licensed technician for those steps.

If the fix is simply reseating a loose connector, there may be no parts cost at all, with only a service call fee ranging from roughly $75 to $150. Replacing the outdoor air temperature sensor typically costs between $20 and $80 for the part, plus labor. If the outdoor PCB requires replacement, total repair costs can range from $200 to $600 or more depending on the unit model and local labor rates.