1. Remove the screw cap from either of the two service valves.
Warning: Wear protective goggles when working.
2. Using a thin, long-bladed screwdriver, gently press the tip of the valve spool and bleed the refrigerant from the system.
Warnings: Discharge refrigerant from the air conditioning system in a well ventilated area or outdoors.
The refrigerant at atmospheric pressure passes into a gaseous state. Discharge the refrigerant from the system in a very thin stream. When refrigerant is drained, some oil mixed with it may splash out. To protect the engine compartment from contamination, place a cleaning cloth around the service valve.