On the dryer, there is a cycling switch which also cuts off the compressor when the preasure is low. Perhaps the switch is defective. GoodluckJoe
The a/c clutch will not engage and the compressor will not come on.............
This could be because you have a leak in you A/C system causing a loss of freon. When there is not enough freon in your system the A/C compressor will not engage, it will harm the compressor.
An air conditioner clutch will not engage without voltage. If it doesn't engage, the compressor will not turn.
You don't need to engage the compressor clutch to recharge the system. In fact, you shouldn't engage it without refrigerant and oil in it, because the refrigerant carries the compressor oil in order to lubricate the compressor. But, to answer your question, you disconnect the low pressure switch, and run a jumper wire between the two female ends of the connector.
Dont jump them, its not a switch, its a transducer and you could wreck your pcm by jumping the wrong one. Run a power wire directly to your compressor to get the clutch to engage. If it doent engage then, it is your clutch. Remember to first check refridgerant level and fuses/relays. Good luck.
Most Likely refrigerant charge is low -- compressor will not engage unless system has proper pressure
This happens to keep the fluid in the compressor viable. If it sits too long, it can become unusable.
What specific kind of vehicle do you have? It does sound like the clutch may be bad, but we also need to know what you are working on. You need to run power straight from the battery to the compressor. If is still does not engage then you need to replace the compressor and clutch, they are dead. If they do engage, then you have a wiring or computer issue.
The clutch receives it's signal to engage from a pressure switch in the system. If there is insufficient refrigerant in the system the pressure switch will not close resulting in no power at the compressor clutch to make it engage.
It sounds like you have a very tight running or bad a/c compressor since most all systems will engage the compressor when the defroster is on...............
You should be able to hear it engage-there is a clutch. If not, check the hot wire when someone turns on with a test light. If it has juice & does not engage, you may have a problem.
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check all A/C electrical connections, like the connector at the compressor.. make sure the compressor is trying to engage, should be an audible click when switched on, check fuses, also check pressure switch on coolant line.. it has a electrical connector on it also, and if coolant is low it will not let the compressor engage.
thats the relay to engage the a/c compressor clutch
The A/C Compressor may not be charged with frion if the A/C Clutch does engage, or it may not engage due to fact it's not sending 12v to the electronic wiring. First start the engine and turn on the A/C, watch if the clutch on the compressor engages or not.
Yes, with both freon and oil for it to operate correctly and engage unless someone has bypassed the pressure switches or relays..........
You should have the system checked for the proper amount of freeon. The compressor will not properly engage if the system is low. Hope this helps.
i think these is not a proper question i do not know
Check the refrigerant pressure. There is a sensor that detects the pressure of the refrigerant. If the pressure is not high enough the compressor will never engage.
You will have to figure out why: This the 90% of the time failur: Is there Freon in the system, if there is not a minimum pressure, usually 17 PSI, the compressor will not run. Is the compressor and clutch capable of working? Is the fuse in good shape.
There is a rely on the drivers side fender. It is the second relay from the front of the car. If it won't engage usually it is that there is too low or too high pressure in the system. Most of the times it it just low on freon and a sensor will not allow the compressor to turn on.
Do you mean that the AC clutch does not engage the compressor? Or do you mean that the AC compressor won't turn even if the clutch is engaged? If the compressor is siezed and will not turn even if the clutch is engaged, the only choice is to replace the compressor. If you can turn the compressor by hand (understand that the belt pulley will turn freely with the engine if the clutch isn't engaged) but the compressor clutch isn't engaging, it might just be out of refrigerant. There is a sensor, usually somewhere near the receiver/dryer) that detects the "low side" refrigerant pressure. Once the refrigerant pressure at the sensor drops below a specified level, the compressor will not turn on. In other words, if the compressor clutch won't engage it might just be out of refrigerant.
Most automotive AC compressors use a cycling clutch compressor, where the clutch is engaged by pressure switches which will engage the compressor clutch when the pressure reaches a predetermined low level, and disengages it when it reaches a predetermined high pressure.
When not engaged, the wheel spins freely. When the low pressure switch closes, it closes the electrical circuit to the compressor clutch. This actuates an electromagnet, which pulls the clutch in to engage it.
Low or no refrigerant Blown Fuse Defective pressure switch Bad clutch on compressor Selector switch