low on freon nothing has a low ac charge take to shop and have a recharge done this will stop the ac clutch and give you cold air again
Assuming this is a factory installed a/c system and not an aftermarket one, there are several possibilities for the clutch engaging and disengaging. When the compressor cycles off, do both fans go off at the same time? The clutch and fans should work together in a properly operating system. The airconditioner routinely would cycle on and off in a good system to prevent the evaporator core from forming ice on the cooling fins and blocking airflow. If the clutch only cycles on and off and the fans remain running, a wiring problem say at the connection to the clutch or the thermal switch on the compressor itself may be defective. Another possibility is that the clutch coil is developing an "open circuit" but cycle times of the clutch engaging and disengaging would be fairly long. I'm sure there are more things that may cause your problem but these are good places to start looking.
if the gap between the clutch plate on the front of the compressor is too wide it will also have a hard time engaging. A/C clutch relay too weak to initiate current demand, clutch windings weak, poor ground or even inline diode (if equipped). When you jump start the compressor you are surging the wire windings which aligns the electrons (temporarily) so the next cycle requires less of a jolt.
Low on freon, faulty pressure switch, faulty clutch. Jumper the low pressure switch with a paperclip (can running, AC on), if the clutch cycles, it's either low on freon, or the low pressure switch is bad.
Probably low on freon.
Things to check first: Turn on the A/C control - open the hood and look at the compressor and observe whether or not the clutch is engaging (clicking on and off). If it isn't then check the fuse/electric relay that control the compressor. If the compressor operates but cycles rapidly (clicks on and off), that could be a sign of low refrigerant, have it checked. If these easy do-it-yourself checks are inconclusive then you need a mechanic.
1. The system has some type of restriction.. 2. You have a bad pressure switch.... 3. The a/c clutch and or coil is bad..........
The refrigerant level is low.
Maybe you just need a tune-up. If that doesn't work, make sure the a/c clutch is actually working and not froze up. If it's not spinning and is locked up, it could cause a load on the engine and stop it.
I had a problem one time with my Chrysler New Yorker. If the power windows would not work then the a/c would not turn on, if I turned the car off and tried the window switch if the window worked the a/c worked. My mechanic said it was a bad ignition switch. He changed it out and no more problems. I believe there may be a code stored in the computer that can be cleared out, if no other problems exist. ----- Here's what you need to do.... (taken from a 4x4 newsboard from "Kevin") Disconnect the battery negative cable to allow the A/C control module to reset. It has gone into fail safe mode due to excessive cycling of the compressor clutch. Once it is reset you will be able to again run the compressor to diagnose the system. It will go into fail safe if the compressor cycles more than 15 times in one minute or something like that (not exactly sure of the time period). Your compressor will cycle too often if you are low on refrigerant and cause the control module to enter the failure mode. When you reconnect the battery & start the truck, immediately start charging the system with freon. There is also a known problem with the harness connector to the low pressure clutch cycling switch that can cause the same problem. Many parts supply stores carry the replacement harness connector to fix the problem of poor and intermittent contact at the connector. To test your low pressure cycling switch harness connector, just wiggle it a little bit while the compressor clutch is engaged. If the connector is bad you will notice the clutch cutting in and out as you wiggle the wires going into the connector.
it would work perfectly well as it did and still does on the Vincent motor cycles of the fotties and fifties their clutch was centrifgal the initail drive being taken up by a single clutch plate as then centrifugal part of the clutch came in as the revs increased
Maybe a 4 cylinder and just reacting to the additional engine power draw of the air conditioner compressor noticable as compressor cycles on and off
If you have " defrost " selected the compressor cycles on and off if it's not too cold outside in order to dehumidify the air - that's normal