Samsung Air Conditioner Error Code E410

E410 indicates an OPEN or SHORT fault on the discharge temperature sensor for fixed capacity compressor 3 in the outdoor unit. The control board has detected a sensor voltage above 4.95V (indicating an open circuit) or below 0.5V (indicating a short circuit). This fault is only triggered when the outdoor temperature is above -10°C. The system will not operate normally until the sensor circuit is restored to a valid reading range.

No. The discharge temperature sensor protects the compressor from overheating by allowing the control system to monitor refrigerant discharge conditions. Operating the system without a valid sensor reading removes that protection and risks serious compressor damage. The unit should remain off until the fault is diagnosed and repaired.

A power reset may temporarily clear the fault display, but the error will return as soon as the system restarts and the control board re-evaluates the sensor signal. Because the fault is tied to a measurable out-of-range voltage condition, the E410 code will continue to appear until the underlying issue with the sensor, wiring, or connector is physically repaired.

Basic checks such as inspecting and reseating the sensor connector are something a knowledgeable DIYer can attempt safely with the unit powered off. However, measuring sensor resistance and diagnosing wiring faults in the outdoor unit requires a multimeter and familiarity with refrigeration system components. Replacing the discharge sensor or the control board should be performed by a qualified HVAC technician, as the outdoor unit contains high-voltage components and refrigerant under pressure.

Repair costs depend on what component has failed. A replacement discharge temperature sensor is typically a lower-cost part, with total repair costs including labor ranging from around $100 to $300. If the outdoor control board is the cause, costs can range from $300 to $600 or more depending on the unit model and labor rates in your area.