Service Port HVAC: Description and Operation

DESCRIPTION

NOTE: 4.0L LHD model shown. Other models similar.





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 system is not accidentally contaminated with R-12 refrigerant or by service equipment used for R-12 refrigerant.

The low-side service port (4) is located on the A/C suction line (1) at either the rear of the engine compartment or near the A/C compressor, depending on the engine and market. The high-side service port (3) is located on the A/C liquid line (2) near the front of the engine compartment. Both the high-side and low-side A/C service port valve cores are serviceable.

NOTE: The protective cap aids in sealing the service port and helps to 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 service port caps are serviceable items.