Let us now learn how to manually engage the AC compressor clutch. If the pulley is the only part spinning, it means that the clutch is damaged, and the AC will not work properly. Start the engine, and then see if the clutch and the pulley are running. First, turn ON the AC and fan to the maximum. When this happens, it means that there is no refrigerant circulating inside the whole system, and the AC system will not work properly.Įxamining the AC compressor is not a challenging task. If the pump is not working, the compressor will not turn. Suppose the compressor clutch is not engaging this is how to check the AC compressor clutch. This is also the same way how to test the ac clutch relay. Test it is using a multimeter to make sure it is working properly. In your car’s fuse box, locate the air conditioning fuse and take it out. If one of these three aspects has defected, then the clutch will never be engaged. Lockout on Clutch Sensors: Most modern cars have their AC clutches turned ON and OFF using high-pressure, and low-pressure switches, and the level of the compressor oil. It, therefore, fails to protect the internal parts of the compressor from getting damaged. When the refrigerant level goes low, the low-pressure switch prevents the compressor from rotating. This is the common reason why the AC clutch is not engaging. AC systems must have a certain amount of refrigerant charge to operate properly. This prevents the temperature from rising and damages the compressor. Therefore, if the oil level is getting low, the AC will automatically shut the compressor off.Įxcess Refrigerant: If the system has refrigerant overcharge, the clutch will not be engaged. This is the work of oil in the compressor. Like any other mechanical device, the AC compressor must have a lubricant between its internal parts to prevent metal-to-metal contact. Read Also: Why is My Car Air Conditioner Not Blowing Cold Air? Now that we have understood about an AC clutch and how does it work? Let us now discuss reasons that may cause the AC clutch not to engage. It subsequently makes the compressor turn and compress the refrigerant. When the user presses the AC button, the electromagnetic coil is energized and attached to the pump rotor by a strong electromagnetic force. The compressor clutch consists of a friction plate positioned adjacent to an electromagnetic coil. As we stated earlier, to start the compressor turning, the clutch must be energized and engaged to the spinning pulley. When using the car’s air conditioner, its air condition compressor must be activated. Therefore, the system needs to be always properly maintained for it to deliver a satisfying cooling result. The AC clutch is a part of the AC compressor, the heart of the Air conditioning system. The shaft is joined to the flywheel’s rotating shaft by an electromagnetic switch. The AC clutch is controlled by a clutch system. It is connected to the flywheel with an accessory belt, and that is how it gets its power. You will also learn how to jump AC compressor clutch to prevent you from getting into sudden AC compressor clutch failures.īefore we get into details on the reasons for the AC clutch not engaging, it is crucial to have some information about the AC clutch.Īn AC clutch is what makes the AC compressor turn. Once you read this article, you will be able to diagnose and know the reason behind the failure. They range from simple to more complicated reasons. Several possibilities can lead to AC compressor clutch failure. We shall discuss the AC compressor, AC clutch, and problems related to the two components. If your AC clutch is not engaging in your car, this article is for you.
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