Samsung Air Conditioner Error Code E265

E265 indicates a SUMP sensor dislocation error, meaning the compressor oil temperature sensor has shifted out of its correct mounting position. The control board detects that the sensor is not providing accurate temperature data, which it attributes to a positioning issue rather than a sensor failure. The unit flags this code to prompt a physical inspection of the sensor's location before operation continues.

Yes, this error should be taken seriously. The SUMP sensor monitors compressor oil temperature to protect the compressor from overheating. If the sensor is dislocated and the system runs without accurate oil temperature data, the compressor could sustain damage from undetected overheating. Address this fault before resuming normal operation.

If the sensor only needs to be repositioned and secured, the repair cost is primarily the cost of a service call, generally in the range of $75 to $150 depending on your location and the technician. If the mounting hardware or the sensor itself needs replacement, parts and labor combined could range from $150 to $400 or more depending on the specific model and parts availability.

If you are comfortable accessing the outdoor unit and inspecting components near the compressor, you can check whether the SUMP sensor has simply slipped out of its bracket and reseat it. However, working near compressor components involves refrigerant lines and electrical connections, so if you are not experienced with HVAC equipment, it is safer to have a qualified technician perform the inspection. Do not attempt to operate the unit repeatedly while the fault is active, as unmonitored compressor oil temperature can lead to compressor damage.

A simple power reset is unlikely to permanently clear E265 because the fault is caused by a physical positioning issue with the sensor, not a transient electrical glitch. The error will typically return after reset if the sensor has not been physically repositioned and secured. The underlying mechanical problem must be corrected first for the code to clear and stay clear.