Question about 2000 Buick Century

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Why does a/c compressor cycle constsntly?

Air is cold and works good but can hear the clutch clicking all the time when a/c is on. It dont do it when it is off..

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It is most likely malfunctioned replace the polley bearing

Posted on Jan 21, 2013


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Posted on Jan 02, 2017

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SOURCE: air condition

Does the evaporator thicker pipe coming to the compressor gets a bit cold or not at all?

Posted on Aug 05, 2008

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SOURCE: Air compressor clutch not engaging? No cold air

No freon pressure no clutch action.

Posted on Aug 20, 2009

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My air conditioner is blowing warm air on the driver side and cold on the passenger side

see this steps and think with clearly and logically NOT feared. God bless you
checkmark.gif Start with the compressor. Does it engage when you turn on the A/C?
If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!).
If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch.
If the compressor does not engage when you jump it, the problem is a bad compressor clutch.
If the clutch engages but the compressor does not turn (the belt will start to slip and squeal), the compressor is locked up and you need a new compressor.
If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged.


Jul 24, 2012 | 2007 GMC Sierra Classic

2 Answers

Air condition blows out air but not cold not hear compressor at all

same to you, but i just change my ac compressor by myself. just bought a verey cheao compressor clutch from and intalled it with my friend. so cool, winter is coming now...

ac compressor replace-tlqq1re1qsfvxmbhbs2lzbrv-2-0_1.jpg

May 25, 2012 | 2004 Saturn VUE

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2004 chevy impala ac compressor is kicked in and full of freon and will not get cold but when the ac compressor starts to make a rattling noise it starts to get cold then it will stop getting cold when...

Sounds like it is clicking in and out which meens its eather low on freon or maybe a bad low pressure switch ? Expansion valve maybe clogged (could be more but too hard to get into?) you do not have orifis tube...hope this helped you?

Jul 27, 2011 | 2004 Chevrolet Impala

2 Answers

03 H2; air conditioner makes a clicking sound when on AIR and you accelerate. Does not do it when air is off. Also, back tail light keeps going out even when you replace bulb. Thanks

Clicking sound you hear is the belt tensioner, due to a malfunctionig a/c compressor ,

the reed valves of the compressor are broken causing unstable pressure that makes the belt tensioner vibrate

Jun 28, 2010 | 2003 Hummer H2

2 Answers

No cold air

Turn the a/c on to high blow fan, select full cold, open the hood with the engine running, the compressor has a clutch attached to the front of it and runs off the a/c fan belt, it will unmistakebly cycle if the system is working properly, you will see it cycle on and off and you will also hear it clicking on and off each time it cycles.
I suggest you start with those tests first and if you see the compressor is not cycling you are probably in need for a recharge of 134a freon which you can do yourself.
First look at the a/c lines and try to locate the sight glass incorporated into one of the thin(high pressure lines)small glass site that is a about 1/4-3/8 inch in diameter, its purpose is to let you know if the system is full charged or if it is partially chrged by means of allowing you to see air bubbles passing through the sight glass only if the compressor is cycling/working, the parts stores all carry the low pressure feed hose attachments and the proper freon to install to bring your vehuicle up to the cold desired from your a/c vents.
Each can of 134a is one pound, the system empty holds 2 3/4 pounds, buy one can of freon + oil Charge and install, one can of freon + leak detector and install and one can of freon + sealer.
If you are over filling the system through the (LOW) side only the system has a check valve that will blow off the excess and will probably scare the heck out of you as well. Please do all work with the engine running, a/c on fulkl cold high fan and eye and hand protection.
The leak detector may take a few hours to show traces of a slow leak, usually it is a colored die that is set into the freon can and must travel throughout the system to find its way to the leak, if the system has a fast leak it will spew out rather quickly, and hopefully if it is a slow leak the can with the leak stop in it may be enough to seal the leak, giving you enough time to save up for the actual repair needed to fix the leak.
Remember to always charge through the low side(wider hose and fitting) as the high side can cause serious harm to you as its high pressures can enter the freon can and cause it to explode.
A loose a/c fan belt causing the problem will be easy to detect as it will really be loose and probably noisey (squealing)when the compressor is on, if so adjust and or replace belt.

Jun 05, 2010 | 1999 Chevrolet Blazer

1 Answer

My 2002 Expedition air conditioner will sometimes blow hot air and others cold air

I would check the following possibilities:
1. Is compressor clutch working? - You need to do this when the ac is blowing hot air only - locate compressor drive pulley on engine - rubber belt wraps around it. Start engine and set to max ac. When the ac is blowing hot air, look at the center of the compressor drive pulley using a good flash light - watch it for a while, it should be spinning with the pulley - this means the compressor is engaged. If not, the compressor is not engaged. If your ac is blowing hot air, then the compressor should be engaged and running (trying to cool). If it is not engaged, then your compressor clutch is probably going out. Could be low voltage to clutch, but more likely the clutch is worn out and only working some of the time. Note: if working normally, the compressor clutch will engage and disengage in cycles- but the air should always be cold. If clutch is bad, compressor would need to be replaced (sold as one unit). This is tricky to diagnose and could take some time - you need to do it when ac is blowing hot air but set to max cooling.

2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

May 07, 2010 | 1999 Ford Expedition

2 Answers


Pop the hood, start the vehicle and turn the AC on. Watch the compressor, it should have a center that rotates on an off and you should hear a clicking sound. This is the compressor clutch you are looking at. If the compressor is not doing this, check the fuses for the AC. If the fuses are good, then most likely the high side sensor switch is not working, therefore the clutch never engages and the air never gets cold.

Try that and get back to me, ok?

Sep 18, 2009 | 2003 Kia Sedona

1 Answer

A/C air sometimes cold, sometimes not on VW Beetle 2001 Turbo

AC will not work with temps are cold even when it is turned on. The air is colder cause the temp is colder. The AC cycles in hot weather because the AC charge is low and needs recharging. You will know this if you open the hood run the AC and you will hear the clicking sound of the AC compressor magnetic clutch. You can recharge it easily buy buying a compatible can of refrigerant. I suggest buying the kit with the gage so you don't overcharge the system which will cause freeze ups

Jul 03, 2009 | 2001 Volkswagen Beetle

1 Answer

2002 a/c compressor clutch keeps engaging and disengaging

If it is engageing rapidly it means it needs to be charged.

Jun 19, 2009 | 2002 Honda Odyssey

2 Answers

A/C was working, now compressor runs, but no cold air.When compressor starts and stops, pressure does not change on low side. Is there a filter that could be plugged?

No inline filter, you may need to recharge this system if the compressor is cycling on and off with no cold air. check the lines for leaks. check the clutch on the compressor as well for its operational value. it should engage with a click during the cycle.

May 25, 2009 | 1995 Chevrolet Camaro

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