Samsung Air Conditioner Error Code E253

E253 indicates a wire open or short fault in the fixed compressor discharge temperature sensor circuit. The control board monitors this sensor to track refrigerant temperature leaving the compressor, and it has detected a resistance value that is out of the acceptable range. The unit shuts down to prevent compressor damage. The fault points to either a disconnected connector, damaged wiring, or a failed sensor.

No, you should not attempt to bypass or ignore E253 and continue running the unit. The discharge temperature sensor is a safety component that protects the compressor from overheating. Operating without a functioning sensor risks severe and expensive compressor damage. Leave the unit off until the fault is diagnosed and repaired.

A power reset may temporarily clear the error code, but it will return as soon as the control board performs its sensor check again, which typically happens at startup. Because E253 reflects an actual electrical fault in the sensor circuit, not a software glitch, the underlying wiring or sensor problem must be corrected for the error to clear permanently. Do not rely on repeated resets as a workaround.

Checking whether the sensor connector is unplugged and reseating it is a straightforward task that most DIYers can handle safely with the unit powered off. Measuring sensor resistance with a multimeter is also manageable if you are comfortable with basic electrical testing. However, if the sensor or PCB needs replacement, or if the refrigerant circuit must be accessed, a licensed technician should complete the work.

Costs vary depending on the root cause. Replacing a discharge temperature sensor typically falls in the range of $50 to $150 for parts, plus labor. If the control PCB has failed, parts alone can range from $100 to $400 or more depending on the model. Wiring harness repairs are generally on the lower end. A diagnostic service call typically adds $75 to $150 before parts and additional labor.