Question about 2001 Jeep Grand Cherokee

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Airconditioning cutting in and out all the time.

Could you tell me why the compressor clutch is always cutting in and cutting out all the time, and when i turn the heat on the a/c light comes on all the time? Thanks Paul 4.7LV8

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When the heats on defrost it automaticly runs the ac for defrost....... as for the clutch its low on freon

Posted on Oct 15, 2008


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A/c freon R134

old post.
step 1 is check the clutch
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is it engaged or not.
this is always step 1, (besides a/c lamp on on dash and must blow air,,blower on it must be on... and blowing. air.)
this 1 check (group) cuts the job in 1/2. every time;
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Find the AC compressor. The pulley on it has an electric clutch that allows the compressor to run when the AC is on and not when it is off. With the engine running you should be able to see if the clutch is turning or not. The pulley turns all the time the engine is running only the clutch behind the pulley starts and stops. Look at the pulley with the AC off. Have someone turn it on and see if the clutch engages to turn the compressor. If it doesn't engage there are a couple thing that could be wrong. First the clutch has burned out and no longer works. The fuse on the AC clutch is blown. Check the fuse. More likely, if the cold air has been getting warmer, the AC system has a refrigerant leak. The system has a low pressure switch that prevents the clutch from engaging when the refrigerant pressure is too low. If the fuse is good then you need to have a qualified AC Technician check the system.

Thanks for using FixYa.

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No power going into clutch airconditioning unit how do I find the problem?

Hello snake
The first place to check is the low pressure cutoff switch, on the a/c
acumulator at the right side firewall. With the engine off and the key on
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Dear Madam or Sir,

there seem to be two different problems with you Explorer.

If all power windows are inoperable, there seems to be a blown fuse. You´ll find a fuse table and diagram within your owner´s manual.

If the fuse is O.K., there has to be a problem with the power windows control module, you have to see a mechanic to service that.

The cause of the inoperable air conditioning is probably a lack of coolant or a defecitve a/c compressor clutch, these are the most common failures on AC Systems. Unfortunately there are no user serviceable parts on an A/C system so this ist a job for the mechanic too.

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Air conditioner compressor stop when the speed up more 1200 rpmin low spees work perfect.

Sounds like a low freon level.
When the compressor runs faster, it reduces the gas level on the low side and the low level sensor cuts off the compressor clutch.

Optionally you have a clogged dryer in the system and the compressor is pulling on it until it is shut off by the same sensor.

Add a can of freon and see if that clears it up. if not, you will need an airconditioning guy to trouble shoot the components to determine the exact cause (dryer??)

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Could be a faulty Clutch Cycle switch or low on freon

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hello first of all you need to see if this belt only drives the ac clutch if so yes you can cut this off the compressor sounds like it is frozen the other option is if there is other things ran with the same belt take a string go around everything but the ac when it meets mark the ending point holding with your finger cut at the mark tape string together like a belt go to part store get a match to the string

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