Hose/Line HVAC: Description and Operation

NOTE: Whenever a refrigerant line is replaced, it is also necessary to replace the suction accumulator/drier.

The condenser to evaporator tube contains high pressure liquid refrigerant upstream of the A/C evaporator core orifice.

The A/C manifold and tube is attached to the A/C compressor with O-ring seals and has the following features:
- the upstream side contains low pressure refrigerant gas.
- the downstream side contains high pressure refrigerant gas.
- a serviceable high pressure A/C charge port valve is located on the downstream side.
- the downstream side also contains a fitting used to mount the A/C pressure cut-off switch. A long-travel Schrader-type valve stem core is installed in the fitting so that the A/C pressure cut-off switch can be removed without discharging the A/C system.