Service Port HVAC: Description and Operation

DESCRIPTION





The high side service port (1) is located on the A/C liquid line, near the upper radiator support. The low side service port (2) is located on the A/C suction line, near the left strut tower. Refrigerant system service ports are used to recover, recycle, evacuate, charge and test the A/C refrigerant system. Unique sizes are used on the two service ports for the R-134a refrigerant system to ensure the proper connections are made when using refrigerant system service equipment, and that the system is not accidentally contaminated with R-12 refrigerant, or by service equipment used for R-12 refrigerant.

NOTE: Protective caps aid in service port sealing and help protect the refrigerant system from contamination. Remember to always reinstall the protective caps onto the service ports when refrigerant system service is complete.

Each of the service ports has a threaded plastic protective cap installed over it from the factory.

The high side and low side A/C service port valve cores and the protective caps are serviceable items.