Focus L4-2.0L (2009)
Service Port HVAC: Description and Operation
Service Gauge Port Valves
The high-pressure service gauge port valve is located on a vertical extension off the receiver/drier tank. The valve can be accessed through an access
hole in the upper radiator air deflector to the right of the LH headlamp.
The low-pressure service gauge port valve is located on the A/C compressor suction line near the RH shock tower.
The fitting is an integral part of the refrigerant system line or component.
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Special couplings are required for both the high-side and low-side service gauge ports.
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A very small amount of leakage will always be detectable around the Schrader-type valve with the service gauge port valve cap removed, and is
considered normal. A new Schrader-type valve core can be installed if the seal leaks excessively.
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The service gauge port valve caps each include an O-ring seal which is used as a primary seal in the refrigerant system to prevent leakage through
the Schrader-type valves from reaching the atmosphere. The service gauge port valve cap O-ring seals should be checked when checking the
refrigerant system for leaks and a new cap should be installed if needed. Always install and tighten the A/C service gauge port valve caps to the
correct torque after they are removed.
