Question about 2001 Chevrolet Silverado 1500

2 Answers

AC compressor won't engage anymore

I was driving in Phx in the 103 degree heat and my AC just quit working. I know it has freon as I put a tester on it and it has 49psi. I checked the fuses and they all are good. It seems like the compressor is not engaging. When I got home I opened the hood and pushed the A/C switch and there was no indication that the compressor turned on. So is there a way to test the relay? could that be an issue? Any help would be greatly appreciated as it is supposed to be 105 degrees tomorrow.

Posted by on

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 4,669 Answers

If you have 49 psi in the system with it not running, you don't have enough freon in it. If it is low it could have shut it self down. Try unhooking the battery to reset the system.

Posted on May 10, 2009

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 186 Answers

Disconnect the ac compressor clutch connector & then start engine.Check for power & ground at connector.If you have power & ground the compressor clutch is faulty.More than likely you have a small leak & have low system pressure.

Posted on May 10, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Now that I've located the pressure switch for the air conditioner compressor on a 1999 Honda Odyssey I would like to know what wires would I jump to each other so that I can put freon in it


Kelly,Trouble shooting forum links below, the 3rd video show which contacts to cross to get AC clutch to engage.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Honda Odyssey not working
Compressor Clutch won engage Honda Tech
Troubleshooting AC unit Honda Odyssey 2003

May 02, 2016 | Honda Cars & Trucks

2 Answers

Compressor does not engage when ac is turned on.


If the system is low or has no Freon, the clutch will not engage. Hook up a pressure tester on the low pressure line valve. It should read 30 psi at 65 degrees outside temperature and 50 psi at 85 degrees outside temperature. If there is pressure, then it could be a fuse or AC relay. If there is no pressure, then add freon with some pag oil, plus a leak dye will have to be added to the system from the low pressure valve. Only add 1 16 Oz. can to not over pressurize the system. If the clutch engages, then check for a leak. I would recommend taking this job to a qualified technician, since he would have the necessary equipment to put the system at a vacuum of -30- To empty the system and check for a leak.

Apr 16, 2014 | 2003 Nissan Altima

1 Answer

My 2008 dodge avenger ac compressor not engaging anymore pulley is running freely from the belt. What can be the cause of this failure? I tried to rotate the central rotor by my hand and its rotating its...


if your a/c has no freon it will not engauge go to walmart get a do it yourself kit and put freon in it but when you do make sure a/c is running on high and as you ad freon the compressor should start cycleing

Jul 30, 2013 | Dodge Dakota Cars & Trucks

1 Answer

A/C and heating core


The leaking heater core won't keep the compressor from working.
You say the ac system is charged, but the compressor won't come on ??
The compressor has to run to charge the system, otherwise you will only get half a can of freon to go in. The system holds 3 or 4 cans when empty.
The low pressure switch has to be jumped to make the compressor run to take the first two cans of freon.

Jul 03, 2012 | Chevrolet Cars & Trucks

1 Answer

Ac clutch


fuse could be blown or freon level is low in system. Ac units think of like a basketball with air loss over time likewise in an older ac unit with rubber seals deteriorating low freon level will not allow compressor to engage

May 20, 2012 | Ford Expedition Cars & Trucks

1 Answer

My a/c compressor is only blowing hot air when I turn it on. I know a little about cars so I know it's the a/c but I am not able to find one on any site that may sell used or new.


If all you get is hot air there are several possibilities. The compressor is driven by the serpentine belt and is engaged and disengaged by an electric clutch mounted on the compressor drive pulley. With the engine running, have an assistant turn on the AC while you observe the AC compressor clutch. If the clutch engages, you can be reasonably sure that the system has freon, and the electric circuit is OK. If the clutch doesn't engage, which is the most likely situation, either you are low on freon, the AC clutch relay is inop, or AC compressor fuse is open (blown). A search of Google images will give you the location of the AC relay. You can pull out the relay, carefully remove the cover, reinsert the relay, and engage the compressor clutch by manually closing the relay contacts. Warning: do this only for a second or two in order to see the clutch engage. If the clutch does engage, then you are probably low on freon. There is a safety switch that prevents the clutch from operating if there is not enough freon in the system. Hopefully, this is the case. Go to Walmart and get two cans of r-134 and the inexpensive kit, and following their instructions, charge your system. If this is not the problem, you'll need a set of AC gauges and the skill to use them. Hope this helps. Dano

Aug 31, 2011 | 1998 Lexus Gs 400

2 Answers

Ac won't get cold anymore power to compressor but won't click on clutch won't engage possible problems are compressor or evaporator what do you think?


Has the Freon been checked with a gauge to see if there is enough Freon to allow the system to work. Low or no Freon will not allow the compressor to engage. The low pressure switch is most likely activated due to low freon, and will cause this condition.

Aug 19, 2011 | 2001 Jeep Grand Cherokee

1 Answer

1999 gran prix a/c is blowing hot air, but was working last year. Put in freon and still does not cool


first turn the ac off and then start the engine. you may want to lift the hood so you can hear the next step better. turn on the ac and within a couple seconds not more than 5 or so you should hear a click sound. This is the ac clutch engaging. if you don't hear a click you can double check the compressor has engaged by looking to see that the center of the ac compressor is turning with the outer pulley. if it is not most likely you don't have enough refrigerant in the system. i would suggest getting an ac pressure tester they are fairly inexpensive but this will tell you for certain if you have enough refrigerant or not.

Mar 31, 2010 | 1999 Pontiac Grand Prix

1 Answer

The AC in my car doesn't work. Everything has been looked at and it system has been charged. Everything works out but no cold air. The you can hear everything come on just like it would with the heat. Any...


When you put on the A/C find out if the compressor is engaging. There are pressure switches for both too little freon or too much freon. If the compressor is not engaging there is a switch on the low pressure side close to the oblong cylinder where you put in the freon. Unplug the switch and put a jumper wire on the wire harness plug. The compressor should engage. If it does you either have too little freon or the low pressure switch is bad.

Aug 10, 2009 | 2004 Mercury Sable

1 Answer

Hi..I have 90 Celica GT model and I came to Autozone to pickup can of Freon to recharge my ac.. Autozone guy came out to check make sure compressor was working when I push the AC button. It was working...


Did you put freon in the car? If you did, and you have too much, there is a "high-pressure" cut off switch, and there is also a "low-pressure" cut off switch. So, if the freon is too little or too much, the AC is prevented from engaging. The best thing to do is take it to a guy who has freon pressure gauges; this is the only way to tell if the charge is correct or not.

Jul 16, 2009 | 1990 Toyota Celica

Not finding what you are looking for?
Cars & Trucks Logo

540 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8269 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...