7) Measure the air temp at the center duct. It can also be caused by bad wirings between the gauge and fuel sender or a blown fuse to the fuel gauge. Automotive Air Conditioning Diagnosis Chart Low Side High Side Duct Temp Possible Cause Low Low Warm low refrigerant c After the vacuum gauge is connected to a vacuum source, readings are noted at idle and then again at 2,500RPM. Thatâ€™s why theyâ€™re also called â€œwidebandâ€ O2 sensors. Higher than normal low side readings and lower than normal high side readings can also point to a compressor â€¦ A vacuum gauge can tell as much about the internal and external workings of an engine as the combination of a voltmeter, compression gauge, stethoscope and timing light. If the vacuum reading starts â€¦ Study with Quizlet and memorize flashcards containing terms like Before installation:Technician A says refrigerant system O-rings can be coated with a gasket sealant. With both low- and high-side valves still closed, start the vehicle and turn on the a/c to max. Look for a â€œno resistanceâ€ reading between the ground on the sender and your boatâ€™s battery ground. Part three, finding and repairing air conditioner leaks Normal Vacuum Gauge Reading. Seriously, for the OP, two things can cause the low side to go into a vacuum: low refrigerant charge or a restriction. If there is a ground wire, you should also check the ground. The AC expansion valve and orifice tube work together to regulate the flow of the AC system.

Who is correct?, Before attempting to service an automotive air â€¦ The procedure is simple, start the engine, activate the AC system, and remove the AC clutch connector. Most direct injection systems use a capacitor and voltage inverter to create voltages that can range from 40 to 100 volts, depending on the system. You drain your battery completely dead too many times and you need to replace it. The diagram shows the flow of R-134a Freon in an automotive air conditioning system. Normal gauge readings should be between 2 and 3 bar on the low side and 14 to 24 bar on the high side.

So, if you see a pulley that isnâ€™t spinning even though the belt around it is moving, thatâ€™s the compressor.

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