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Air Conditioning Prob

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by DeesleK5, Apr 12, 2001.

  1. DeesleK5

    DeesleK5 Registered Member

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    Seeing that it is coming up on summer and those of us that live in Hot climates, ie - dallas might need some help with the AC. I got my truck back from the shop a few weeks ago, was in getting frame work, and when i got it back the AC was only blowing luke cold air, basically blowing air, not cold. As i drove though the air coming out of the vents seemed to get warmer, not good, so i turned it off and rolled the windows down. So i figure the fan is working but something else is wrong, any suggestions would be gladly taken

    Will
     
  2. flcpl4fn

    flcpl4fn 1/2 ton status

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    Mine basicly did the same thing. One day was working great, then the next morning nothing. It turned out to be the compressor and the condenser blew a seal. I was lucky, my brother in law is a GM mechanic and owns his own shop, and he replaced everything and upgraded the freon to the new stuff for under $800.

    '85 Jimmy in Jax, Fl
     
  3. weisel

    weisel 1/2 ton status

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    Mine did the same thing at the end of last summer. Im fixing it now. It turned out to be that a hose sprung a leak, let out all my freon, and so the compressor wouldn't come on (it has a saftey sensor in the system). See if your compressor is comming on or not and check back.

    Insurred by Smith & Wesson
     
  4. BlazerCol

    BlazerCol Registered Member

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    Roll your windows down and stick your elbow out the window as far as you can, its free.

    BlazerCol
    88 K5
    Ford Sucks
     
  5. Wheels

    Wheels 1/2 ton status

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    Funny, I just got the AC working today. Did a upgrade to R134A. Total cost was right at $500 and we are expecting 30's next week. A leak in the system, old hoses, a noncondensable in the system, worn out compressor, you name it can cause your symptoms. Best bet is to either get a set of gauges and do a low side and high side pressure check or take it to a shop and have them run a check on the system. Check the fan belt and see if it's worn. Check all the connections and see if there is any signs of a leak (some oily residue at the connections). Other than that, not much you can repair on the system today with all the EPA regulations in place. The cost to retrofit a system here in OKC is around $350 and that is just a simple purge, flush, change o-rings, vacuum down and refill with 134. This is a short term fix as the entire system will fail generally in about the first year (depending on the age of the components). Sad part is I have the EPA certification and still took it to someone else to service the freon. ($150).
     
  6. DMK

    DMK 1/2 ton status

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    Low on freon take somewere to have leak checked. Would guess that a hose is bad.
     
  7. weisel

    weisel 1/2 ton status

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    what dose r-12 and r134a cost anyways? (I have an uncle who is certified and want to know what he can buy it for)

    Insurred by Smith & Wesson
     
  8. DMK

    DMK 1/2 ton status

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    134 is cheap r12 is exspensive. Should find leak first.
     
  9. BlazerGuy

    BlazerGuy 3/4 ton status

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    r-134a is about $3-5 and r-12 is around $70-80 per pound, I think you need somewhere around 5 pounds to fill the system

    Murphy's Laws on Life :
    "It is a mistake to allow any mechanical object to realize you are in a hurry."
     
  10. Wheels

    Wheels 1/2 ton status

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    In OKC, r-134 is $16 per pound and r-12 is $45 per pound.
     
  11. DeesleK5

    DeesleK5 Registered Member

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    I will try to check it this weekend, first i will look for a leek and then go from there and check the freon level, we will see, i will let you guys know

    Will
     

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