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  1. #1

    Default air conditioner not working properly 01 silverado

    Hi,
    Im new to this forum, and I was searching through the tech pages but the search engine says 'ac' is not a valid search term.

    My problem is this. I have an 01 Silverado with about 110000 mi on it and recently my A/C seems to work fine as long as I am highway cruising, but as soon as I start slowing down or idling for any length of time I only get hot air. After 10-15 min of highway driving it starts to get cold again.

    Do I just need a recharge or is something else wrong.

    Thanks for the help
    Jaridd - Texas

    01 Chevy Silverado z71

  2. #2
    Jr. Engineer
    Join Date
    Aug 2009
    Location
    Muddy Creek, Va & Hunting Quarters NC
    Posts
    225

    Default

    sounds like it is low on refrigerant. At idle do you hear the compressor cutting on and off? There is a switch that cuts out the compressor when the suction pressure (low side)gets to low. When you are at highway speeds the compressor is turning faster and pumping more refrigerant increasing the pressure and providing more cooling.

  3. #3

    Default

    Thanks, thats what I kind of figured. I will get it checked out and get the refrigerant refilled.

  4. #4
    Master Mechanic zubbiez's Avatar
    Join Date
    Feb 2009
    Location
    Eagle Mountain Utah
    Posts
    663

    Default

    Damn It thats the same thing mines been doing! guess I better get it recharged.
    2000 Silverado Z71 Whipple Supercharger, JBA Headers,3" cat back Flowmaster Exhaust, Volant cai, Pioneer Preimer deck,Orion subwoofer,03 signal light mirrors,03 taililghts

  5. #5

    Default Fixed - I think

    I bought one of the r134a recharge kits at Walmart and I had cold air in under a minute.

  6. #6
    Jr. Engineer
    Join Date
    Aug 2009
    Location
    Muddy Creek, Va & Hunting Quarters NC
    Posts
    225

    Default

    Good to hear you have some cold air!

  7. #7

    Default

    I just joined this forum and this is my first post. I did a search for my problem and found this thread which describes my problem to a tee. I have a 2001 Yukon XL that the AC goes to hot air blowing after idling for about 5-10 minutes in hot weather, on the road it cools very good whether its hot weather or not. So comparing here, it sounds very much like the issue in this thread and tells me that I need some R134. And with a Walmart just a mile away my solution will be a ditto.

    Im going to try this today and see if it solves the problem. If it does it will save me a couple hundred bucks for a repair by my favorite shop. I'll post later and yall know.

    Regards

    Buffalo Chip

  8. #8

    Default

    Quote Originally Posted by BuffaloChip View Post
    I just joined this forum and this is my first post. I did a search for my problem and found this thread which describes my problem to a tee. I have a 2001 Yukon XL that the AC goes to hot air blowing after idling for about 5-10 minutes in hot weather, on the road it cools very good whether its hot weather or not. So comparing here, it sounds very much like the issue in this thread and tells me that I need some R134. And with a Walmart just a mile away my solution will be a ditto.

    Im going to try this today and see if it solves the problem. If it does it will save me a couple hundred bucks for a repair by my favorite shop. I'll post later and yall know.

    Regards

    Buffalo Chip
    Awesome. Lets us know!

    Also what part of Louisiana you from?



    If at first you don't succeed, get a bigger cheater bar.

    Current:
    1999 GMC Sierra SLT Z71 | 5.3 "Vortec" | Spectre "Cold Air Intake" | TransDapt TBS | Hypertech 30005 Tune | 2005 Chevy Tail Lights | Denali headlights | Grill Mounted Fog Lights | AWS Bug Shield | 265/70/16 Futura Scramblers | Boss HD Speakers | 2005 Overhead Console | Flowmaster Super 40 mufflers 2N1O | Mostly stock-ish
    Future:
    Bigger Amp Alternator | Electric Fans | Transmission Fluid cooler | Paint (Halfway there)| Interior Restoration/Upgrade with newer model parts | Window Visors (In channel) | Tint | Low-Profile Tool Box | LEDs throughout stock cab locations (68% Done) | And whatever is spurr of the moment
    CVN-69 "IKE-ATRAZ" AIR/V-2 Gear Dawgs

  9. #9

    Default

    Not to burst your bubble, but just note that if the refrigerant is low, it cane out through a leak somewhere. Without fixing the leak, the recharge will "leak" out as well.

    Now, it may be a very slow leak and last for a while, but buy a second can, you will probably need it.
    Last edited by RayVoy; 09-22-2013 at 07:21 PM. Reason: Spelling
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  10. #10

    Default

    my 04 silverado blows out freezing cold air then it starts blowing out hot air. if i shut the truck take the key out open door then shut and restart it, it blows out cold again. it is full of r134 but have friends with similar problems and it ends up being the climate control switch.

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