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Error code reference

Samsung Air Conditioner Error Code E415

Sump-main sensor breakaway error.

Samsung codesSamsung air conditioner codes

Sump-main sensor breakaway error.

First step from the service manual

Check if digital compressor sump sensor is separated; reassemble.

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

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What E415 means on a Samsung air conditioner

Error code E415 on a Samsung air conditioner indicates a sump-main sensor breakaway error related to the digital compressor. Specifically, this fault triggers when the control system detects that the sump temperature sensor on the digital compressor has become physically separated or disconnected from its mounting position. The sump sensor monitors the temperature at the base of the compressor, which is critical for protecting the unit from operating under unsafe thermal conditions. When this sensor loses contact, the system can no longer reliably track compressor sump temperature, and the unit faults out as a protective measure.

The most common cause of this error is physical separation of the sensor from its mounting point on the compressor sump. This can happen due to vibration over time, improper handling during a previous service visit, or failure of the adhesive or clip that holds the sensor in place. The sensor lead or connector may also have worked loose rather than the sensing element itself separating, so both the mounting point and the wiring harness connector should be inspected closely.

Diagnosis begins with a visual inspection of the digital compressor sump sensor to confirm whether it has physically detached from the compressor body. If the sensor is found separated, it should be reattached securely to its designated mounting location before clearing the fault and restarting the unit. If the sensor appears to be in position but the error persists, inspect the wiring harness for damage, pinching, or a loose connector at the control board.

Source: manufacturer service documentation.

Common causes of E415

  1. 01

    Sump sensor physically detached from compressor

    Wiring / connection

    The sump temperature sensor has separated from its mounting location on the digital compressor body. This is the primary cause indicated by the error and should be the first thing inspected visually.

  2. 02

    Sensor connector loose or disconnected

    Wiring / connection

    The wiring harness connector linking the sump sensor to the control board may have worked loose due to vibration or prior service work. Check the connector at both the sensor end and the board end.

  3. 03

    Damaged sensor wire or harness

    Part replacement

    The wiring between the sump sensor and the control board may be pinched, abraded, or broken, causing an open circuit that the system interprets as a sensor breakaway. Inspect the full length of the harness for visible damage.

  4. 04

    Failed sump sensor

    Part replacement

    The sensor itself may have failed internally, producing a signal that falls outside the expected range and triggers the breakaway fault. If the sensor is properly seated and wiring is intact, test or replace the sensor.

  5. 05

    Control board fault

    Part replacement

    In rare cases, the control board may incorrectly report a sensor breakaway even when the sensor and wiring are intact. This should only be considered after all sensor and wiring checks have been completed.

See the test procedure for each cause

Frequently asked questions about E415

What does E415 mean on a Samsung air conditioner?
E415 is a sump-main sensor breakaway error on Samsung air conditioners equipped with a digital compressor. It means the control system has detected that the temperature sensor mounted on the compressor sump has become separated or disconnected. The unit shuts down to prevent the compressor from running without proper temperature monitoring. Reassembling or reconnecting the sensor and clearing the fault is the recommended first step.
How do I fix error code E415 on my Samsung air conditioner?
Start by powering down the unit and inspecting the digital compressor sump sensor to see if it has physically separated from the compressor body. If it has, reattach it securely to its mounting location, ensure the wiring connector is fully seated, and then restart the unit. If the error returns after reattaching the sensor, check the wiring harness for damage and test the sensor itself for proper function.
Is it safe to run my Samsung air conditioner while E415 is displayed?
No, you should not continue operating the unit while E415 is active. The sump sensor monitors compressor temperature as a protective measure, and running the compressor without reliable temperature data can lead to overheating and serious compressor damage. The unit is designed to shut down when this fault is detected, and it should remain off until the sensor issue is resolved.
Will resetting my Samsung air conditioner clear the E415 error?
A simple power reset will not permanently clear E415 if the underlying sensor issue is not resolved. The fault will return as soon as the unit attempts to operate and the control system checks for a valid sump sensor signal. The sensor must be physically reattached and all connections confirmed secure before the error will stay cleared after a reset.
How much does it cost to repair a Samsung air conditioner E415 error?
If the sensor simply needs to be reattached, the repair may cost little to nothing beyond a service call fee, which typically ranges from $75 to $150 depending on your area. If the sensor itself needs to be replaced, parts and labor combined usually range from $100 to $300. Control board replacement, if required, is the most expensive scenario and can range from $300 to $600 or more including labor.

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