Samsung Air Conditioner Error Code E262

Error code E262 on a Samsung air conditioner indicates a breakaway or disconnection condition involving the digital compressor discharge temperature sensor. Specifically, the control board monitors both the digital compressor discharge temperature and the fixed compressor 1 discharge temperature simultaneously. When the difference between these two readings exceeds 40 degrees Celsius, the system triggers E262. This threshold exists because the two compressors in a multi-compressor system should operate within a predictable temperature range of each other under normal conditions. A gap larger than 40 degrees Celsius signals that one sensor is not reading accurately, most commonly because the digital compressor discharge sensor has physically separated from its mounting point on the discharge line.

The discharge temperature sensor is a thermistor-based component mounted directly on the compressor discharge pipe. When it pulls away from the pipe surface, it reads ambient air temperature rather than the actual pipe temperature, producing a dramatically lower value compared to the fixed compressor 1 sensor. This large differential triggers the fault. The condition can also arise from sensor wiring damage, a failed thermistor, or, less commonly, a genuine operating anomaly between the two compressors such as a refrigerant imbalance or a compressor performance issue causing one discharge line to run abnormally hot or cold.

The first diagnostic step is to physically inspect the digital compressor discharge temperature sensor to confirm it is properly seated and secured against the discharge pipe. If it has separated, reassembling and securing it correctly will restore accurate readings. If the sensor is physically in place but the fault persists, the thermistor itself or its wiring harness should be tested for continuity and proper resistance values before assuming a compressor-level problem.