Samsung Air Conditioner Error Code E237

E237 indicates a suction temperature sensor breakaway fault. The system detected that the difference between the suction line temperature at startup and the current reading stayed below 2 degrees Celsius for 30 consecutive minutes. This typically means the sensor has lost contact with the suction pipe and is not accurately tracking refrigerant temperature changes.

A power reset may temporarily clear the fault code, but E237 will return if the underlying cause is not corrected. If the suction sensor is still detached or faulty after the reset, the unit will detect the same abnormal temperature pattern within 30 minutes of operation and trigger the code again. The physical issue must be addressed for the error to clear permanently.

If the fix is simply reseating a loose sensor or holder, the cost may only be a service call fee, generally in the range of 75 to 150 dollars depending on your region and technician. If the sensor itself needs replacement, parts and labor combined typically range from 100 to 300 dollars. A refrigerant-related cause, if confirmed, would involve additional diagnosis and potentially higher repair costs.

Start by checking whether the suction temperature sensor and its holder are securely attached to the suction line. If the sensor has come loose, reseating it in the holder and confirming firm contact with the pipe may resolve the error. If the sensor and holder are properly positioned and the fault persists, the sensor wiring and sensor resistance values should be tested to determine whether replacement is needed.

Running the unit continuously with E237 active is not recommended. The suction temperature sensor provides data the control system uses to protect the compressor. If the sensor is giving inaccurate readings, the system may not respond correctly to abnormal refrigerant conditions, which could lead to compressor stress or damage over time. It is best to have the sensor inspected and corrected promptly.