Recharge the AC System Refrigerant

Safety Precautions: Always wear safety glasses and gloves when working with pressurized refrigerant. Consult your vehicle's service manual for the exact refrigerant type (e.g., R-134a or R-1234yf) and the manufacturer's specified pressure capacity.

1. Locate the low-side service port on the AC system, typically identified by a larger diameter aluminum tubing with a blue or black cap marked 'L'.
2. Connect a professional-grade refrigerant recharge kit with a built-in pressure gauge to the low-side port while the engine is running and the AC is set to 'MAX' cooling with the fan on high.
3. Slowly add refrigerant according to the kit manufacturer's instructions, ensuring the pressure gauge reading stays within the vehicle's specified range (typically 25-40 PSI depending on ambient temperature).
4. Monitor the pressure gauge closely; do not exceed the recommended PSI, as overcharging can cause permanent damage to the compressor.
5. Once the pressure is within the specified range, verify the fix by checking that the AC compressor clutch center is now spinning and that the air blowing from the vents is cold.
6. If the system loses pressure again, take the vehicle to a professional technician to locate and repair the underlying leak.