Samsung Air Conditioner Error Code 308

Error code 308 on a Samsung air conditioner indicates a suction temperature sensor error. The control board has detected an open or short circuit condition in the sensor that monitors refrigerant temperature on the low-pressure return line. The fault is caused by a disconnected connector, a broken wire, or a failed sensor. The unit will typically stop operating until the fault is resolved.

A power reset may temporarily clear the error display, but if the underlying fault in the suction sensor circuit is still present, the code will return as soon as the unit restarts and attempts to read the sensor. A reset alone is not a repair and should only be used as part of the diagnostic process to confirm whether the fault is intermittent or persistent.

If the fix is simply reseating a loose connector, there may be no parts cost, though a service call fee typically applies. If the suction temperature sensor needs to be replaced, parts and labor costs together generally range from $75 to $250 depending on the model and local labor rates. Wiring harness repairs can vary further depending on the extent of the damage.

Some causes of error code 308 can be addressed without professional help, such as reseating a loose sensor connector or inspecting wiring for obvious damage. However, if the sensor itself has failed or wiring needs to be replaced, a technician with access to the correct parts and a multimeter is recommended. Any work that involves refrigerant or internal electrical components should be performed by a qualified technician.

It is not advisable to continue running the unit with error code 308 active. The suction temperature sensor provides data that the control board uses to protect the compressor from liquid refrigerant slugging and other damaging conditions. Operating without a functioning sensor removes that protection and could lead to compressor damage over time.