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Error code reference

Samsung Air Conditioner Error Code E276

Error on top sensor of compressor 1 (Short or Open).

Samsung codesSamsung air conditioner codes

Error on top sensor of compressor 1 (Short or Open).

First step from the service manual

Check connector and measure resistance.

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

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What E276 means on a Samsung air conditioner

Error code E276 on a Samsung air conditioner indicates a fault detected on the top sensor of compressor 1. This sensor is a thermistor that monitors the discharge or top-shell temperature of the compressor. When the control board reads a resistance value outside the expected range for the thermistor, it logs E276 and may shut down the compressor to prevent damage. The fault can be triggered by either a short circuit condition (abnormally low resistance) or an open circuit condition (infinite or very high resistance).

The top compressor sensor is a negative temperature coefficient (NTC) thermistor, meaning its resistance decreases as temperature rises. Under normal operating conditions, the sensor produces a predictable resistance curve that the control board uses to monitor compressor health. A short circuit typically results from damaged insulation, moisture intrusion, or a pinched wire causing two conductors to contact each other. An open circuit usually indicates a broken wire, corroded connector terminal, or a failed thermistor element.

Diagnosis begins at the electrical connector linking the sensor to the control board. The connector should be inspected for corrosion, bent pins, and secure seating. After confirming the connector is intact, resistance across the thermistor leads should be measured with a multimeter. An open circuit will show no continuity or extremely high resistance, while a short will show near-zero ohms. If the connector and wiring are intact but resistance is out of range, the thermistor itself has failed and requires replacement.

Source: manufacturer service documentation.

Common causes of E276

  1. 01

    Faulty or failed thermistor

    Part replacement

    The thermistor element inside the sensor can fail over time due to heat cycling, producing resistance values that fall outside the acceptable range. This is the most common root cause once wiring and connectors have been ruled out.

  2. 02

    Loose or corroded connector

    Wiring / connection

    The connector between the top compressor sensor and the control board can loosen, corrode, or develop oxidation on the terminals, causing intermittent or permanent open circuit readings. Inspecting and reseating the connector is the recommended first step.

  3. 03

    Damaged sensor wiring

    Part replacement

    The wire harness running to the top compressor sensor can be pinched, abraded, or broken, resulting in either a short circuit or open circuit condition. Visually trace the wiring from the sensor to the connector and look for signs of chafing or damage.

  4. 04

    Moisture or refrigerant contamination

    Wiring / connection

    Water ingress or refrigerant oil contamination at the sensor connector or along the wire harness can cause a short circuit between conductors. Check for signs of moisture or oily residue near the sensor and connector area.

  5. 05

    Control board fault

    Part replacement

    In rare cases, the input circuit on the main control board that reads the sensor signal can fail, causing the board to report an incorrect resistance reading even when the sensor itself is functional. This should only be considered after the sensor and wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about E276

What does E276 mean on a Samsung air conditioner?
E276 indicates an error on the top sensor of compressor 1, caused by either a short circuit or an open circuit in the thermistor or its wiring. The top compressor sensor is an NTC thermistor that monitors compressor shell temperature. When the control board detects a resistance reading outside the expected range, it triggers this fault code and may disable the compressor to prevent damage.
Can I fix E276 myself, or do I need a technician?
Some basic checks, such as inspecting the sensor connector for looseness or visible wire damage, can be performed by a knowledgeable DIYer. However, accurately measuring thermistor resistance and accessing the compressor sensor typically requires disassembling part of the unit and using a multimeter correctly. If the sensor or control board needs replacement, a qualified technician is strongly recommended.
Is it safe to run my Samsung air conditioner with error code E276 active?
Operating the unit while E276 is active is not recommended. The top compressor sensor is a protective component that helps prevent the compressor from overheating. Without accurate temperature monitoring, the compressor could be damaged if it runs under abnormal conditions. The system may lock out the compressor automatically as a safety measure.
Will resetting the air conditioner clear the E276 error code?
A power reset may temporarily clear the error code if the fault was caused by a momentary electrical disturbance or a loose connector that reseated itself. However, if the thermistor has failed or there is actual wiring damage, the code will return once the unit restarts and the control board re-reads the sensor. The underlying fault must be diagnosed and repaired for the code to clear permanently.
How much does it cost to repair a Samsung air conditioner with error code E276?
Repair costs depend on what component has failed. Replacing a thermistor sensor is generally a lower-cost repair, while a control board replacement is more expensive. Parts and labor combined can range from around $100 to $400 or more depending on the specific unit model and local labor rates. Getting a diagnostic visit from a certified technician is the best way to determine the exact cost.

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