Samsung Air Conditioner Error Code P508

P508 means the compressor has been shut down by the high pressure sensor protection control 2. This is a safety shutdown triggered when the refrigerant high-side pressure exceeds a critical threshold. The system stops the compressor automatically to prevent damage. The root cause must be corrected before the unit will operate normally again.

No. The P508 code is a compressor protection shutdown, meaning the system has already stopped the compressor to prevent damage. Attempting to force the unit to run without resolving the high pressure condition could cause compressor failure, which is a costly repair. Leave the unit off until the issue is diagnosed and corrected.

Repair costs depend on the root cause. Cleaning a condenser coil may cost between $75 and $200 for a service call. Replacing a condenser fan motor typically runs $150 to $400 including parts and labor. Refrigerant adjustments or pressure sensor replacement can range from $100 to $350. Compressor replacement, if damage has already occurred, can range from $800 to $2,000 or more depending on the unit.

Some causes, like a dirty condenser coil or blocked airflow around the outdoor unit, can be addressed by a knowledgeable homeowner. However, issues involving refrigerant charge, pressure sensor replacement, or fan motor failure typically require a certified HVAC technician. Handling refrigerant also requires EPA Section 608 certification in the United States.

A power reset may temporarily clear the fault and allow the unit to restart, but if the underlying cause is not fixed, the P508 error will return, often quickly. Repeated high pressure shutdowns can stress the compressor and refrigerant circuit components over time. A reset should only be attempted after the cause has been identified and addressed.