Question about 1999 Chevrolet Silverado 1500

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The ac will blow cold then after a few minutes the compressor will cut off and will not kick back on for a while. I have changed the clutch cycle switch and that has not helped.

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  • BB1BUD May 11, 2010

    Check the fan clutch operation. Heat the engine to normal operating temp. Then feel if it fan draws in air or put a 1 foot square of cardboard in front of the radiator and see if it stays in place.

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  • Master
  • 474 Answers

Could be it needs to be recharged

Posted on Sep 13, 2009

  • nuckle bustr Sep 13, 2009

    could be it needs to be recharged

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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 have a 2001 Ford Mustang V6, the ac is blowing warm air. We checked the refrigerant and it is full. The ac compressor will kick on for a few seconds and then kick off. Why is the compressor not staying...


it's either low (in spite of your readings) or your a/c clutch is not working correctly or you have too big an air gap in the clutch.
First, just disconnect the 2 pin connector from the a/c pressure cycling swithc and jumper the 2 pins with a wire to force the clutch to stay engaged. See if it blows cold then, and stays engaged. You can run this way for about 15 minutes before you have to pull the plug.
report reulsts.

please don't forget to rate.

Sep 01, 2011 | 2001 Ford Mustang

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

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1 Answer

Ac compressor not switching on 1986 Peugeot 505.GTI How can I test clutch wiring,. Have just aquired this car , heater blowers etc. working but ac clutch not cutting in, is there a switch I have not found....


The best thing to do first is to check the AC clutch itself if it's working, locate the air - con compressor and you will see a wire coming out from the front top of the AC-compressor, it has a connection, remove tht connection and take a piece of wire, connect it to the wire frm the AC-compressor and the other end of the wire to the battery positive terminal,by doing so you will hear a clicking sound of the clutch at the AC-compressor, better still is to start the car's engine, switch 'ON' the AC as normal, let the blower blow thn connect tht wire frm the AC-compressor to the positive side of the battery terminal and check it out if the AC-compressor rotates and also you may get in the car and see if its blowing cold air.
Please also check this -->
HEAT/COLD selector (on the dash) is not selected at HEAT...if it is thn the AC-compresor clutch will not kick in!
Hope this helps!

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3 Answers

My compressor will kick on and off at random, air is ice cold too


Just change the clutch, its not that hard of a job. If you change the whole unit you will have to vacuum pump the whole thing down. And replace the freon. Just change the clutch. you might want to check the saftey switch that stops you from running with out freon.

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Truck AC keeps kicking off


Have you tested the presure in the system? Check the condensor, (is it clogged or restricted, also check the clutch fan. With engine NOT running, move the blade up and down. You should feel a resistance and there should me no lateral (front to back of vehicle) play.

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A/c trouble 2001 silverado


you havent check the pressior of the compressor make sure is full loaded

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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

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