Samsung Air Conditioner Error Code E412

E412 means the discharge temperature sensor for fixed compressor 1 has physically separated from its mounting position on the discharge pipe. This sensor is responsible for monitoring heat levels at the compressor outlet. Because the control board can no longer read a valid temperature, it stops operation and displays E412 to protect the compressor from running unmonitored.

No, you should not continue operating the unit while E412 is active. The discharge temperature sensor protects compressor 1 from overheating, and without a valid sensor reading the system cannot detect dangerously high discharge temperatures. Running the compressor in this condition risks serious and costly compressor damage.

If the sensor only needs to be reseated, the repair cost is primarily the service call fee, which typically ranges from $75 to $150 depending on your region and technician. If the retaining hardware or the sensor itself is damaged and requires replacement, parts costs are generally low, but total repair costs including labor could range from $100 to $300. Compressor-related repairs that stem from delayed attention to E412 can cost significantly more.

Start by locating the discharge sensor on compressor 1, which is typically clipped or clamped to the high-pressure discharge line exiting the compressor. If the sensor is found loose or detached, reseat it so the sensing tip makes firm contact with the pipe and secure any retaining hardware. Restart the unit after reassembly to confirm the error clears.

A simple power reset will not permanently clear E412 if the discharge sensor is still separated. The error will return as soon as the control board checks for a valid sensor signal. The sensor must be physically repositioned and secured before the fault will stay cleared after a restart.