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Error code reference

Samsung Air Conditioner Error Code E265

SUMP sensor dislocation error

Samsung codesSamsung air conditioner codes

SUMP sensor dislocation error - compressor oil temperature sensor dislocated.

First step from the service manual

Check if SUMP sensor location is mounted in the right position.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What E265 means on a Samsung air conditioner

The E265 error code on a Samsung air conditioner indicates a SUMP sensor dislocation error, meaning the compressor oil temperature sensor has moved out of its correct mounting position. The SUMP sensor is responsible for monitoring the temperature of the compressor oil, which is critical for protecting the compressor from overheating and ensuring proper lubrication conditions during operation. When the control board cannot receive a stable or plausible temperature reading from this sensor, it flags E265 to alert the technician that the sensor's physical position may have shifted rather than the sensor itself having failed electrically.

The most important distinction with this error is that it points to a mechanical positioning issue rather than an outright component failure. The sensor may have vibrated loose from its mounting bracket or clip, been inadvertently knocked out of place during a previous service visit, or simply not been seated correctly during installation. Because the sensor is attached near the compressor sump area, normal compressor vibration over time can gradually work it free from its mount. When the sensor is not in full contact with the intended surface, the temperature readings it transmits will be inaccurate or erratic, triggering the dislocation fault.

The first diagnostic step is to physically inspect the SUMP sensor and confirm it is seated securely in the correct mounting position on the compressor. Check the sensor bracket, retaining clip, or fastener for damage. If the sensor has simply shifted, repositioning and securing it properly will often clear the fault without requiring any parts replacement.

Source: manufacturer service documentation.

Common causes of E265

  1. 01

    Sensor vibrated out of mounting position

    Wiring / connection

    Normal compressor vibration over extended operation can gradually loosen the sensor from its bracket or retaining clip. Inspect the sensor mount for looseness and reseat the sensor firmly in its designated location.

  2. 02

    Improper installation or prior service disturbance

    Wiring / connection

    The sensor may not have been properly secured during original installation or a previous repair visit. Check whether the sensor is positioned against the correct surface on the compressor sump and that any mounting hardware is intact.

  3. 03

    Damaged or broken mounting bracket or clip

    Part replacement

    The retaining clip or bracket that holds the SUMP sensor in place may have cracked or broken, preventing it from holding the sensor correctly. If the hardware is damaged, replacement of the mounting hardware or sensor assembly will be needed.

  4. 04

    Sensor wiring harness pulling sensor out of position

    Wiring / connection

    A harness that is routed too tightly or has shifted can apply tension to the sensor, pulling it away from the compressor surface. Inspect the wiring route and relieve any tension before repositioning the sensor.

  5. 05

    Faulty or damaged SUMP sensor

    Part replacement

    If repositioning the sensor does not resolve the error, the sensor itself may be damaged and unable to provide accurate readings even when properly mounted. In this case, the sensor will need to be replaced.

See the test procedure for each cause

Frequently asked questions about E265

What does E265 mean on a Samsung air conditioner?
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.
Can I fix the E265 error myself?
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.
Is the E265 error on a Samsung air conditioner a safety concern?
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.
Will resetting the unit clear the E265 error?
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.
How much does it cost to repair the E265 error on a Samsung air conditioner?
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.

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