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Error code reference

Samsung Air Conditioner Error Code E268

Sump Sub 2 breakaway error.

Samsung codesSamsung air conditioner codes

Sump Sub 2 breakaway error.

First step from the service manual

Check if oil temperature sensor is separated from compressor; reassemble.

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

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What E268 means on a Samsung air conditioner

Error code E268 on a Samsung air conditioner indicates a Sump Sub 2 breakaway error, which refers to a disconnection or separation of the oil temperature sensor from the compressor sump assembly. The sump area of the compressor holds lubricating oil, and Samsung systems use dedicated temperature sensors at this location to monitor oil conditions and protect the compressor from running under conditions that could cause excessive wear or thermal damage. When the control board loses a valid signal from this sensor, it interprets the condition as a breakaway fault and generates the E268 code.

The most direct cause of this error is physical separation of the oil temperature sensor connector or probe from its mounting point on the compressor body. Vibration from normal operation, improper installation, or handling during previous service work can dislodge the sensor from its seated position. When the sensor loses contact with the compressor surface, the temperature reading becomes invalid or absent, triggering the fault. In some cases, a damaged sensor lead or corroded connector can produce the same result even if the sensor body itself has not moved.

Diagnosis begins with a physical inspection of the oil temperature sensor and its connection to the compressor. The sensor should be seated firmly against the compressor sump and its wiring harness should be intact with no signs of chafing, corrosion, or pull damage at the connector. If the sensor has separated, reseating and securing it properly is the first corrective action. If the sensor or its wiring is found to be damaged, replacement of the sensor assembly is required before the fault will clear.

Source: manufacturer service documentation.

Common causes of E268

  1. 01

    Oil temperature sensor physically separated

    Wiring / connection

    The sensor probe has become dislodged from its mounting point on the compressor sump. This is the primary cause identified for E268 and is confirmed by visually inspecting the sensor's position on the compressor.

  2. 02

    Loose or disconnected wiring connector

    Wiring / connection

    The wiring harness connector linking the oil temperature sensor to the control circuit may have loosened due to vibration. Inspect the connector at both the sensor end and the board end for secure seating.

  3. 03

    Damaged sensor lead or wiring

    Part replacement

    Chafing, pinching, or pull damage along the sensor wire can break continuity and simulate a disconnected sensor. Check the full length of the wire for visible damage or corrosion at the terminals.

  4. 04

    Faulty oil temperature sensor

    Part replacement

    The sensor itself may have failed internally, producing an open circuit or out-of-range signal even when physically seated correctly. A failed sensor requires replacement to resolve the fault.

  5. 05

    Control board input fault

    Part replacement

    In rare cases, the control board may incorrectly interpret the sensor signal due to a board-level fault. This should only be considered after the sensor and wiring have been confirmed to be in good condition.

See the test procedure for each cause

Frequently asked questions about E268

What does E268 mean on a Samsung air conditioner?
E268 is a Sump Sub 2 breakaway error, indicating that the oil temperature sensor has separated or disconnected from the compressor sump. The air conditioner monitors oil temperature to protect the compressor, and when the sensor signal is lost, the unit stops operating and displays this code. The first step is to check whether the sensor has physically come loose from the compressor and reseat it if so.
Can I fix the E268 error myself?
A knowledgeable DIYer or technician can address this error by locating the oil temperature sensor on the compressor, checking that it is properly seated, and inspecting the wiring for damage. If the sensor has simply come loose, reseating it may resolve the fault without any parts. However, if the sensor or wiring is damaged, replacement parts and some technical skill will be needed, and working near a compressor in a sealed refrigerant system should be approached carefully.
Is it safe to keep running my air conditioner with an E268 error?
You should not continue running the unit while E268 is active. The oil temperature sensor exists to protect the compressor from overheating or operating under unsafe oil conditions. Running the system without a valid sensor reading removes that protection and risks compressor damage, which is a significantly more expensive repair.
How much does it cost to repair an E268 error on a Samsung air conditioner?
If the sensor only needs to be reseated, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the oil temperature sensor itself requires replacement, parts and labor combined can range from $150 to $350 depending on the model and labor rates in your area. A control board replacement, if needed, would cost considerably more.
Will resetting my Samsung air conditioner clear the E268 error?
A power reset may temporarily clear the fault display, but the E268 error will return if the underlying issue, specifically the separated or faulty oil temperature sensor, has not been resolved. Resetting without addressing the root cause does not fix the problem and could allow the system to run without proper compressor protection. The sensor must be properly seated and functional before the code will stay cleared.

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