Manifold Gauge Set: Notes
WARNING: This page is about a different car, the 1997 Jeep Wrangler, 1997 Jeep Grand Cherokee, and 1997 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
A manifold gauge set is used to determine system's high-side and low-side pressures, correct refrigerant charge, system diagnosis and operating efficiency. High (discharge) and low (suction) pressures must be compared to determine system operation. Manifold gauge sets for the 2 refrigerant types are basically the same except for fittings at ends of hoses. Fittings are different to ensure connection only to appropriate refrigerant system.