Service Port HVAC: Description and Operation

Service Gauge Port Values:

The high-pressure service gauge port valve is located on the high pressure liquid line.

The low pressure service gauge port valve is located on the evaporator to accumulator/drier suction line.

The fitting is an integral part of the refrigerant line or component.

- Special couplings are required for both the high side and low side service gauge ports.
- A new Schrader-type valve core can be installed if the seal leaks.
- Always install the A/C charging valve cap on the service gauge port valves after repairing the refrigerant system.