Samsung Air Conditioner Error Code E317

E317 indicates a high pressure sensor breakaway fault. This means the control board has lost communication with the high-side refrigerant pressure sensor, either because the sensor has disconnected physically, the wiring has failed, or the sensor itself has stopped working. The unit shuts down to prevent unsafe operation without accurate pressure data.

No. The high pressure sensor is a safety component that protects the compressor and refrigerant circuit from dangerously high pressures. Operating the unit without a functioning high pressure sensor risks compressor damage or refrigerant system failure. The unit should remain off until the fault is resolved.

Repair costs vary depending on the cause. If it is simply a loose connector, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the high pressure sensor needs replacement, parts and labor combined may range from $150 to $400 or more depending on the unit model and local labor rates. A control board replacement, if needed, would increase costs further.

Checking and reseating a loose connector is something a knowledgeable DIYer can attempt, but working with refrigerant circuits and replacing pressure sensors involves pressurized components and should be handled by a certified HVAC technician. If reseating the connector does not clear the fault, professional diagnosis is recommended.

A reset may temporarily clear the fault code, but if the underlying cause such as a disconnected sensor or failed sensor component has not been addressed, the error will return when the unit powers on and checks the sensor signal again. The root cause must be corrected for the fault to stay cleared.