Service Port HVAC: Description and Operation

DESCRIPTION





Two refrigerant system service ports are used to recover/recycle/evacuate/charge and test the A/C refrigerant system. Unique sizes are used on the service ports for the R-134a refrigerant system to ensure the system is not accidentally contaminated with R-12 refrigerant or service equipment used for R-12 refrigerant.

NOTE: On HEV models, the low side service port is partially hidden under the air filter housing Air Cleaner Body - Removal .

The high side service port (5) is located on the A/C liquid line (3) above the A/C receiver/drier (2). The low side service port (6) is located on the A/C suction line (9) at the top of the engine. Both the high side and low side A/C service port valve cores are serviceable.

Each of the service ports has a threaded plastic protective cap installed over it from the factory. After servicing the refrigerant system, always reinstall both of the service port caps.