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AC blows not so conditioned air.

This is a discussion on AC blows not so conditioned air. within the General Help forums, part of the LSx Technical Help Section category; My AC has worked fine all summer. I took a 2hr highway trip and my AC starts blowing warmish air, ...

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    Junior Member Kramsdell's Avatar
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    AC blows not so conditioned air.

    My AC has worked fine all summer. I took a 2hr highway trip and my AC starts blowing warmish air, I got off the highway to grab some food/drinks and my AC starts to run cold again. What could cause this?

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    Electrical Engineer KMdef9's Avatar
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    Compressor relays could be going.

    Has it happened again yet?

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    Smiles for 9.5 Years cammed goat's Avatar
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    What RPM was the engine spinning at when the A/C starting blowing warm? I only ask as the A/C compressor disengages at upper RPMs to avoid being damaged.

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    Junior Member Kramsdell's Avatar
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    I was cruising on the highway in 6th with 3.43s, I think that's around 1200 rpm?

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    Junior Member Kramsdell's Avatar
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    Quote Originally Posted by KMdef9 View Post
    Compressor relays could be going.

    Has it happened again yet?
    haven't had it happen again since then, but I haven't been on the highway for that long either...

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    Huh, Thats odd. Yeah im going to say its either your Relay, or your A/C needs to be flushed out and re-charged. Good luck, keep us posted on it.

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    Electrical Engineer KMdef9's Avatar
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    Quote Originally Posted by Kramsdell View Post
    haven't had it happen again since then, but I haven't been on the highway for that long either...
    Where you using cruise control when the AC went out? If it was working when the AC went out, then the relay should be fine (they use the same one).

    If the problem was solved by giving everything a short break, I wouldn't stress. But if it happens again, pull over and leave it running and see if the AC clutch is spinning or not. I won't always spin the whole time, but should engage from time to time.

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    Junior Member Kramsdell's Avatar
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    Yes, cruise control was on when the AC started to blow warmish air. How can I tell if the AC clutch is spinning? Sorry, I'm still a noob to most of this stuff.

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    Junior Member Kramsdell's Avatar
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    I have a can of r-134a left over from my Jeep, should I attempt to check the pressure with it? (came with a gauge) and maybe fill it up? Where is the fill nozzle?

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    Single Malt rbob93's Avatar
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    Check your AC belt

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    Electrical Engineer KMdef9's Avatar
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    Quote Originally Posted by Kramsdell View Post
    Yes, cruise control was on when the AC started to blow warmish air. How can I tell if the AC clutch is spinning? Sorry, I'm still a noob to most of this stuff.
    There's a center part to the pulley of the compressor, you can actually hear it engage as well once you what sound it is. Like I mentioned before, the clutch will spin for alittle while then stop, then start again.
    Quote Originally Posted by Kramsdell View Post
    I have a can of r-134a left over from my Jeep, should I attempt to check the pressure with it? (came with a gauge) and maybe fill it up? Where is the fill nozzle?
    Typically if your low or out of refrigerant, the cool air doesn't come back. But it can't hurt to check/top off. You want to hook up to the low side port, not the high side. I believe the kit should only be able to hook up to the low side anyways. I can't remember exactly right now, but I think it's located on the passenger side near the front of the car, but I'm not positive at the moment.

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    Member RedSuperSport's Avatar
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