Samsung Air Conditioner Error Code E315

E315 indicates a high pressure sensor error caused by an OPEN or SHORT condition in the sensor circuit. The system detects this fault when the compressor is preparing to start, specifically when the sensor signal voltage falls below 0.4V (SHORT) or rises above 4.2V (OPEN). The unit will not allow the compressor to run until the fault is cleared.

No. The high pressure sensor is a safety component that protects the compressor and refrigerant circuit from dangerously high pressures. With E315 active, the system cannot confirm that pressures are within safe operating limits. Running the unit in this condition risks compressor damage and should be avoided until the fault is resolved.

Repair costs vary depending on the root cause. If only a connector or wire repair is needed, labor costs are typically modest, often in the range of $75 to $150. Replacing the high pressure sensor itself can add $50 to $150 in parts depending on the model. A main control board replacement, if required, is the most expensive outcome and can range from $200 to $500 or more including labor.

Some causes of E315, such as a loose connector or visibly damaged wire, can be identified and corrected by a knowledgeable DIYer. However, working near refrigerant lines and electrical components carries real risk, and diagnosing the sensor voltage accurately requires a multimeter and some familiarity with HVAC wiring. If you are not comfortable with electrical diagnostics, a qualified technician is the safer option.

A power reset may temporarily clear the displayed error, but the code will return as soon as the compressor prepares to start again if the underlying wiring or sensor fault has not been corrected. A reset alone does not fix the problem and should not be used as a substitute for proper diagnosis.