Samsung Air Conditioner Error Code 265

Error code 265 on a Samsung air conditioner indicates a SUMP sensor dislocation error. The SUMP sensor monitors conditions at the condensate collection point of the unit, typically tracking water level or temperature within the sump area to ensure proper drainage and prevent overflow or freezing conditions. When the control board detects that the sensor has moved out of its designated mounting position, or that readings fall outside the expected range due to physical displacement, it triggers this fault code to halt operation and protect the system.

The most common trigger for this error is physical dislocation of the sensor from its bracket or mounting clip. Vibration during normal operation, improper reassembly after a service visit, or loosened retention hardware can all cause the sensor to shift away from its correct measurement point. When the sensor is not seated properly, it may return erratic or out-of-range values that do not match expected sump conditions, causing the control board to flag the dislocation fault.

Diagnosing this error begins with a physical inspection of the SUMP sensor mounting location. The sensor should be secured firmly in its designated bracket with no visible gaps or lateral movement. Check the wiring harness connected to the sensor for any strain, pinching, or disconnection that could accompany a displacement event. If the sensor is correctly repositioned and the error persists, inspect the sensor itself for damage and verify connector integrity at the control board.