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Home >> Buick >> 1992 >> Roadmaster Limited >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C System General Servicing >> Mid (Test) Position

Mid (Test) Position

After service gauge manifold set has been installed (valve stem in back-seated position), turn valve stem 1 1/2 to 2 turns inward. This positions valve stem midway, allowing full system operation and permits refrigerant pressure to reach gauges.

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