Question about 1994 GMC Yukon

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Does the clutch on the ac unit itself need to be spinning for ac to be working?

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If your talking about the part of the clutch that's on the inside of the A/C compressor pulley the answer is; yes.

Posted on Jul 09, 2010

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Posted on Jan 02, 2017

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1 Answer

The battery in my 1999 Nissan Altima died, now the ac clutch won't engage


Coincidence. If AC clutch is not engaging, it is usually due to the fact that you have an insufficient refrigerant charge in your system.

If unit is charged then check the wiring to clutch mechanism and unit itself for continuity of the winding.

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My 2004 GMC Envoy AC unit is only working for 20 minutes and then it shuts off. I believe its overheating and I don'tknow what to do


may need a recharge or the compressor itself or the clutch unit needs replacin--go to a specialist and havum pressire test system--a partstore like napa can assist you also

Sep 15, 2014 | 2004 GMC Envoy

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One day my ac stop working, ac clutch doesn't engage but it is not froze, it still spins


Chances are you may have a low pressure relay that shut it off. Check the pressure and add more r34 if its low on coolant.

Aug 01, 2013 | Cars & Trucks

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I ust had the water pump replaced. Now my ac has gone out. I know nothing about cars but I do know that I hear a strange noise and the front part of the ac unit was turning and now it's not. It seems...


It is unlikely that the replacement of the water pump and AC failing are related, however ensure that the V belt is correctly positioned and under tension. The AC pulley should be spinning continuously by the V belt. The AC compressor is engaged by an electrically operated clutch within/behind the pulley wheel. If the pulley wheel is not spinning but the belt is sliding over it then you have a seized AC compressor and this will most probably need replacing. If the wheel is spinning but the AC compressor is not working (no cooling) then it is the clutch that is not engaging. This could be due to a worn clutch, failed clutch actuator, broken electrical connection, failed relay, broken fuse a failed interior thermostat (the car thinks that the 'set' temperature has been reached and so switches the AC off). To check, put the AC on the lowest setting and test the voltage at the AC compressor connection. If voltage is being supplied it is likely to be a failed AC clutch. There are lots of AC clutch repair videos on youtube and these should be a great help.

Aug 22, 2011 | 1999 Mercury Mystique

1 Answer

I'm tryin to find out if my a/c compressor is out. So I know that the dealer said that I need it charged and I didn't get it done. So lately it has been makin a loud noise and rattlin on the...


You may be having AC problems but that is not what happened when the Steering locked unless the AC is on the same belt as the Power steering unit. That whining you are hearing when you turn is actually the power steering unit being low on fluid or the power steering pump going out. Based on what you have described my guess is that the unit has gone out and needs to be replaced. As far as the AC compressor is concerned, if the unit is low on Freon it will not engage once it gets too low unless the clutch goes out. When you look at the center of the AC compressor when the engine is running and the AC is off you should see the pulley free spinning and the very center of the pulley won't be spinning, that is the clutch Dis-engaged. When you turn the AC on the Clutch should engage and allow the compressor to work. You will hear it kick in and kick out repeatedly if it is low on Freon. If it is too low it will never kick in because the low pressure switch won't allow it.

Jun 16, 2011 | 1995 Oldsmobile Aurora

1 Answer

A/c issue 2006 sante fe


The AC unti is driven by a belt coming from the crankshaft. The belt is attached to the ac compressor which has a clutch unit that is suppose to let the compresser pully spin freely. by the sounds of your problem you might need a new pully/clutch for your ac compressor

Aug 12, 2009 | 2006 Hyundai Santa Fe

2 Answers

How to restart the AC compressor


Unhook the battery for 1 minute.

Jun 28, 2009 | 1997 Mercedes-Benz C-Class

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Air conditioning clutch


check to make sure the a/c system is fully charged, if it is not the system will not turn on, if you need more help get back to me. please rate my fix as i strive to be the best

Apr 24, 2009 | 2000 Dodge Durango

1 Answer

2002 Dodge Caravan (3.3 liter V6) air conditioner clutch?


you can but part is usually about the same price

Nov 11, 2008 | 2003 Dodge Caravan

1 Answer

Screeching noise, then a/c stops blowing cold air. Still blows air, just not cold air.


it could be the air conditioning clutch going out. to check turn your car on and idle it with ac on and hood open. at the ac compressor it will have a pulley on it with a clutch that engages when the air conditioning is on. if it engages and disengages it can be the clutch itself has gone bad, the ac clutch will also disengage if there is not enough freon in the ac system, will also engage and disengage if the pressure gets too high in the ac system. Depending on the year of the vehicle it will disengage at full throttle and come back on when you are not at full throttle.
If it is a metallic sounding screech for example take a coke can and drag it across pavement kind of sound it could be a bad compressor or a bad ac clutch. If it is a more rubbery sound for example a car spinning its tires kind of noise it could be a loose belt.

1. Check to make sure all belts are tight under hood
2. start car and look at ac compressor to make sure compressor pulley is turning and that the fan clutch is engaged spinning


Aug 09, 2008 | Mercedes-Benz 400-Class Cars & Trucks

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