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AC does not blow cold.

Discussion in '1st Gen. Tacomas (1995-2004)' started by blacktaco1, Jun 24, 2011.

  1. Jun 24, 2011 at 1:12 PM
    #1
    blacktaco1

    blacktaco1 [OP] Member

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    Hello folks,

    Got a question here hoping someone with a similar experience/expertise can help me out with. Im thinking it might just need a new compressor but im in no was mechanically savvy, so thought id put it out there....

    The AC does not blow cold since I bought the truck used 1 year ago. Today I refilled the freon with a gauge and kit from a car parts store. The pressure before refill was around 5 psi and now its 40 psi (recommended level). I ran the AC for several minutes before and after filling and its still not cold. Also when I switch on the AC i dont hear the engine change pitch. Ive heard the engine sound like its working harder in other cars when the AC is turned on.

    Thanks for your time,
    R
     
  2. Jun 24, 2011 at 1:19 PM
    #2
    BradleyScottETC

    BradleyScottETC Class IV Category 8 Elite VIP Member (Only)

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    Sounds like a compressor to me. You should be able to hear the clutch disengage and engage very easily when idling with the A/C on if you leave the hood up. I dont know the year of your truck because you didn't post it on here, but somebody was selling a compressor from a first gen on this site a few weeks ago, I don't think anyone bought it.
     
  3. Jun 24, 2011 at 1:20 PM
    #3
    BlueTaco07

    BlueTaco07 Super Mod!

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    Try adding in freon?
     
  4. Jun 24, 2011 at 1:21 PM
    #4
    BradleyScottETC

    BradleyScottETC Class IV Category 8 Elite VIP Member (Only)

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    That would be a waste of time and money if you don't verify the compressor is working beforehand. :p
     
  5. Jun 24, 2011 at 1:37 PM
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    BlueTaco07

    BlueTaco07 Super Mod!

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    I like wasting money :rolleyes:
     
  6. Jun 24, 2011 at 1:52 PM
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    blacktaco1

    blacktaco1 [OP] Member

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    Tacoma 2004- sorry.

    Right, so just fiddled around with it a little bit and it looks like now the compressor does turn on/increases the engines revs while idling. I believe this is because i did add freon up to the recommended PSi and the safety on/off is now sensing adequate levels of freon and turning the compressor on.

    There is a hissing noise from under my glove box. Dont know what it is and took the glove box out to look around but cant figure out where its from. I did monitor PSI of the freon while running the engine with AC on high for a while and it didnt lower so i think no leak.

    hmmm... so if the compressor is turning on and the freon is topped up... whats next?
     
  7. Jun 24, 2011 at 2:09 PM
    #7
    Chainsmoker

    Chainsmoker Well-Known Member

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    Condenser
     
  8. Jun 24, 2011 at 2:11 PM
    #8
    Chainsmoker

    Chainsmoker Well-Known Member

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    For A/C issues I'd take it to a shop. Downside is it can be a good chunk of change.
     
  9. Jun 24, 2011 at 2:22 PM
    #9
    blacktaco1

    blacktaco1 [OP] Member

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    Thanks. The chunk of change thing is the reason im trying to figure it out myself...
     
  10. Jun 24, 2011 at 2:22 PM
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    BlueTaco07

    BlueTaco07 Super Mod!

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    Theres still a vacum? Any leakes?
     
  11. Jun 24, 2011 at 2:26 PM
    #11
    67tone67

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    Orfic tube . Always a good idea to change it when u replace compressor.....
     
  12. Jun 24, 2011 at 2:27 PM
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    67tone67

    67tone67 Well-Known Member

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    Alot of ac's hiss after u turn them OFF.... When do you hear it?
     
  13. Jun 24, 2011 at 2:28 PM
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    blacktaco1

    blacktaco1 [OP] Member

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    I hear the hiss when the AC is ON only. Goes away when i switch it off. Its is a hiss, not a cricket sound like Ive heard people talk about when theres leaves etc in their blower.
     
  14. Jun 24, 2011 at 5:16 PM
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    bicklebok

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    You may have an orifice blocked. Sounds like the compressor is doing its job. And you are right, a compressor will not come on without any freon in it.
     
  15. Jun 24, 2011 at 5:37 PM
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    Steves104x4

    Steves104x4 Well-Known Member

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    BUCKLE UP! It makes it harder for Aliens to pull you out of your Truck.
    Check for cold air coming out between the air box and firewall in the engine compartment; When this seal deteriorates you end up air conditioning the engine compartment (at least your motor is getting cool) If you feel cold air coming out, silicone around it to seal it up.

    Check the drain tube that sticks out the firewall (probably under the air box) in the engine compartment on the passenger side IS draining water to the road below, if not, its plugged and you'll have to remove the air box cover inside the cab to clean it out (have a pail ready because ALOT of water will dump onto your passenger floorboard.


    Steve
     
  16. Jun 24, 2011 at 5:41 PM
    #16
    VirginiaBound

    VirginiaBound Whyareyoureadingthis?

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    Have you recently done a barrel roll?
     
  17. Jul 5, 2011 at 11:39 AM
    #17
    blacktaco1

    blacktaco1 [OP] Member

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    Thanks to everyone for your suggestions. Ill check the blower next for obstructions. I dont think there will be any liquid from condensation forming and dripping on the road under the car if the AC doesnt work properly as it will lack this part of the process. Talked it over a bunch and read a little more. Most likely its a faulty compressor.

    Any thoughts on how to test for a faulty AC compressor?

    Replacement cost?

    Right.

    Thanks again for your time.
    R
     
  18. Jul 5, 2011 at 1:28 PM
    #18
    bicklebok

    bicklebok Well-Known Member

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    When the compressor is running, do you see one of the lines running to the firewall sweat from cold? I know very little about air conditioners, but I have always been under the impression that if the compressor will run, its ok. Check that line I asked you about and that will let you know if it's producing cold air that may be getting lost as mentioned in another post.
     
  19. Jul 6, 2011 at 5:32 AM
    #19
    67tone67

    67tone67 Well-Known Member

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    Midas has free A/C inspections... As do other places... Go have it checked and go from there.
     
  20. Jul 6, 2011 at 10:16 PM
    #20
    blacktaco1

    blacktaco1 [OP] Member

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    Midas do free inspections? Whoah. Thanks!
     
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