Samsung Air Conditioner Error Code 264

Error code 264 on a Samsung air conditioner indicates a discharge temperature sensor dislocation error specific to the fixed scroll compressor 3. In multi-compressor commercial or multi-zone systems, each compressor has a dedicated discharge temperature sensor mounted at a precise location on or near the compressor discharge port. This sensor monitors the temperature of the refrigerant gas leaving the compressor, which is critical for protecting the compressor from overheating and ensuring the system operates within safe thermal limits. When the system detects that the sensor reading for compressor 3 is inconsistent with expected values, it flags error 264 to indicate the sensor may have shifted from its correct mounting position.

The term "dislocation" in this context refers specifically to the physical positioning of the sensor rather than an electrical fault such as an open circuit or short. A sensor that has slipped, loosened, or been incorrectly reinstalled after prior service will not make proper thermal contact with the intended measurement point, causing it to report inaccurate discharge temperatures. This can result in readings that are too low, too high, or erratic depending on where the sensor has migrated. The control board interprets this discrepancy as a positional error rather than a wiring or component failure.

The first diagnostic action is to physically inspect the discharge temperature sensor on fixed scroll compressor 3 and confirm it is seated and secured in its designated mounting bracket or port. Technicians should also check for any signs of prior service work that may have disturbed the sensor, including loose retention clips, damaged mounting hardware, or sensor cable strain that could pull the probe out of position.