Samsung Air Conditioner Error Code P8

P8 means the compressor has been shut down by the low pressure protection control. The system detected refrigerant suction pressure below 3 kg/cm²G during cooling mode for 2 seconds before the pump down cycle could begin. The unit stops the compressor automatically to prevent mechanical damage from operating in a low-pressure, refrigerant-starved condition.

No. The P8 code means the system has already shut the compressor down to protect it. Attempting to bypass the protection or repeatedly resetting the unit without fixing the underlying cause risks serious compressor damage, which is one of the most expensive components in the system. Leave the unit off until the root cause is diagnosed and corrected.

Repair costs vary widely depending on the cause. Cleaning a clogged filter costs nothing, while topping off refrigerant after fixing a leak typically runs in the range of $150 to $400 depending on refrigerant type and labor rates. Replacing an EEV or low pressure sensor generally falls in the $200 to $600 range including parts and labor. Compressor replacement, if the unit was run without protection, can cost $800 to $1,500 or more.

Some causes, like a clogged air filter or a blocked indoor unit, can be addressed by a homeowner. However, diagnosing refrigerant charge levels, repairing leaks, and testing or replacing the EEV or pressure sensor require refrigerant handling certification and specialized tools. A licensed HVAC technician should handle any work involving the refrigerant circuit.

Resetting the unit may temporarily clear the code and allow the system to restart, but the P8 error will return as soon as the suction pressure drops below 3 kg/cm²G again during cooling operation. A reset does not fix the underlying problem. Repeated compressor cycling under a low pressure condition will cause progressive damage.