Question about 1993 Chevrolet S-10 Blazer

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Ac compressor the ac compressor is making a noise and it goes from hot to cold, usually have to tap on compressor to get to kick in but not always

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Posted on Aug 01, 2008

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Mag clutch is going bad most likely.. Time for a new pump.
Check the two wire connector first though for a bad wire end...

Good luck!

Posted on Aug 01, 2008

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83 chevy ac compeser kicks on but no cold air


May just need a recharge, you can buy kits with a gauge at walmart or parts stores, worth a try and a lot cheaper than a $300 compressor.

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2004 ford expolorer air conditioning will not stay on


I would suspect the AC compressor cycling switch (located in low pressure line from compressor) or a AC cutoff wide open throttle relay ( in under hood fuse and relay center) would be causing this problem.

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I have a 2000 Dodge Ram 1500 that will blow cold and hot air for only a few minutes. After that is only ambient air temps. It is a 5.7 ltr, automatic with only one set of climate controls. The heater core...


you say it will blow cold and hot air for only a few minutes. You don't say but I assume you mean will blow cold a few min. when turned on AC max , blow hot only a few min. when turned to heater hot. Assuming thats the situation and you say AC charged and shows good on the low side -you should charge the AC to a full charge on the low side will cause problems with the AC air compressor kicking on and off. I suggest while the engine is running and turned to AC cold max watch the AC air compressor clutch to see if it does indeed kick on and off if so charge completely. As far as the heater make certain you coolant is all the way to the top and the best way to do this is when engine is completely cold remove radiator cap and fill completely and completely close cap then fill overflow container just to the cold level. That should fix your problem.

Sep 06, 2011 | 2001 Dodge Ram 1500 Truck 2WD

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I INSTALLED A NEW COMPRESSOR AND DRYER AND CONVERTED MY 1984 F-150 TO 122. THE COMPRESSOR MAKE A NOISE WHEN INGAUGED AND KICKS IN AND OUT BUT SUPER COLD. WHAT SHOULD THE GAUGES READ WHEN CHARGES CORRECTLY?


the AC system needs to be evacuated again using vacume pump and recharged after applying oil to it. if the AC compressor still make noise then it needs to be replaced a long with the dryer .

Aug 31, 2011 | 1984 Ford F 150

2 Answers

The AC system is making an purge noise not sure if when the compressor kicks on the belt slips or what because it only does it while driving not at idle. In the cab windows up sounds like purge widows down...


If it is a purge noise the highside pressure may be getting to high and relieving pressure.Usually this can occur if there is too much freon or a restriction in the ac system.The defroster utilzes the ac as well which is why you can hear this. From your description it sounds as if the compressor clutch bearing is going bad.

Jul 05, 2010 | 1999 GMC Sierra

1 Answer

1986 chevy S10 has no power (12v) at fuse box on the fuse for ac clutch. checked both sides of fuse to ground 00v. ac/heater fuse 12v both sides (fan) works fine


hello, check all fuses, and relays, make sure wires to ac is not broke or has been pinched, sometimes you can run hot wire from battery, to compressor, touch hot side of plug in on comp wire see if it will kick on, if so sounds like a short, if compressor dont kick on with hot wire run to it, tap the out side of comp clutch and see if it kicks on, these compressors will not kick on any way if they are low on freon, once freon is full it should work.

Apr 08, 2010 | 1986 Chevrolet S-10 Blazer

1 Answer

My air con does not deliver cold air. I had it diagnosed by an air con specialist who said the compressor had an open circuit fault and needed to be replaced. My local garage replaced the compressor at the...


to hear things like this really bugs me why would any mechanic replace a parts not knowing that is the problem and call them self a mechanic. Going to give you the best run down as I can think of, and at least we know now you have a new compressor and we can leave that out as the problem.
1 check for leaks, If no pressure your compressor will not run. a dye can be added when charged the
system to see any leaks may exist by using black light.
2 check pressure switch & pressostat making sure is not faulty, if it faulty, the switch will not sense
any pressure to kick the compressor on.
3. check AC fuse, making sure is not blown, if blown no power to ac switch
4. check AC relay, making sure is good relay, bad relay compressor will not work or kick on.
5. Make sure your have no moisture or air in the system, system will not operate up to 100% if any
of those items exist in the system, best way to charged the system is to vacum the system out
first removing any moister and air in the systems, keep in mind, air is 02 can convert into
moister/water molecules if its cold enough.
6. expansion valve faulty, this unit usually goes out like compressor do. it sense the temperature,
regulate refrigerant flow to evaporator. everything may run and operate correctly, if this unit goes
bad it will restrict refrigerant flow cycle and evaporator will not get cold.
I would replace number 6, eventhough if its not bad, it need to be place regardless because of the year of your vechicle, cost 5 bucks. Note: My guess, when you push the ac button do you hear the compressor kick on, if not my guess would be 1 and 2. replace.. If your compressor is running than it would be no. 6 and make sure you have lots of feon in the systems. good luck, hope that help some.

Jul 10, 2009 | 1998 Volvo V70

3 Answers

A/C blowing hot air. Compressor activates and system has pressure.


Could be the expansion valve. That's what allows the temperature to actually drop in the system - the contents of the AC system are under pressure, and are at a certain temperature. When the freon goes through the expansion valve, the pressure drops suddenly and dramatically, which "flash chills" the freon, allowing the air to blow cold. If it fails, you may get lukewarm air from the AC despite everything else working. Also though, check to see whether the AC evaporator fan (underhood) is working - on some cars, if it doesn't turn on, the compressor won't be run enough to cool the air.

Jul 29, 2008 | 2003 GMC Yukon

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