Samsung Air Conditioner Error Code E314

E314 indicates a fault with the SUMP TEMP FIXED 3 sensor in the outdoor unit, detected as either an open or short circuit condition. The error is only triggered when outdoor temperatures are above -10 degrees Celsius, which helps the system rule out cold-weather sensor behavior. It points to a problem with the sensor itself, its connector, or the wiring between the sensor and the control board.

It is not recommended to continue running the unit while E314 is active. The SUMP TEMP FIXED 3 sensor provides temperature data that the system uses to manage refrigerant and compressor operation. Running without accurate sensor data can lead to improper operation, potential compressor damage, or further component failures.

A power reset may temporarily clear the error code from the display, but it will return if the underlying sensor fault is still present. Because E314 is triggered by an ongoing electrical condition detected by the PCB, the fault must be physically corrected before the code will stay cleared. Resetting without repair is not a long-term solution.

Some causes of E314 are DIY-accessible, such as reseating a loose connector or inspecting wiring for visible damage. However, measuring thermistor resistance correctly requires a multimeter and some familiarity with reading resistance values. If the thermistor or PCB needs replacement, a qualified HVAC technician should handle the repair, especially since the outdoor refrigerant circuit is involved.

Repair costs depend on the root cause. If only a loose connector needs reseating, the cost is minimal and may just cover a service call, typically in the range of $75 to $150. Replacing the thermistor sensor itself usually runs $100 to $250 including parts and labor. If the outdoor unit PCB is at fault, costs can range from $300 to $600 or more depending on the model.