Thread: BEWARE: Dumb question inside

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  1. #1 BEWARE: Dumb question inside 
    GT Level Member Supercharged99's Avatar
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    So I'm well aware that this is probably a really stupid question but attached to this post is the HVAC control panel on my 99 GTP.

    My question is how do I turn on my A/C without using the Auto button? I'm used to cars that actually say A/C so I'm befuddled and I'm trying to determine if my AC even works LOL
    BEWARE: Dumb question inside Attached Images
    1999 GTP...stock for now
    2007 Suburban...far from stock
    1991 GMC Dually...74k original miles. Work in progress. Far from done.
    1977 C-10 (my baby)...too many mods to list
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  2. #2 Re: BEWARE: Dumb question inside 
    GTX Level Member QUICKSILVER462's Avatar
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    If the "ECON" button light is not illuminated, then the a/c is "ON", or press the "AUTO" button and set the temp. to 60 degrees and control the amount of air with the fan speed, thats the way I do it. I live in Florida so the a/c is almost always on full blast for me, I never use a fan setting less than 3 anyways, I like the cold air blowing on me when driving, the actual temp. inside the car is irrelevant.
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  4. #3 Re: BEWARE: Dumb question inside 
    GT Level Member Supercharged99's Avatar
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    Quote Originally Posted by QUICKSILVER462 View Post
    If the "ECON" button light is not illuminated, then the a/c is "ON", or press the "AUTO" button and set the temp. to 60 degrees and control the amount of air with the fan speed, thats the way I do it. I live in Florida so the a/c is almost always on full blast for me, I never use a fan setting less than 3 anyways, I like the cold air blowing on me when driving, the actual temp. inside the car is irrelevant.
    Interesting. I would have never guessed this about the ECON button. Not real intuitive to my little pea brain I guess LOL That confirms that my AC needs charged then. I can never get cold air to come through my vents regardless of what I do. That's where the assumption was made that I was doing something wrong. Which I kinda was, but still..... LOL


    Thanks for the response, quicksilver.
    1999 GTP...stock for now
    2007 Suburban...far from stock
    1991 GMC Dually...74k original miles. Work in progress. Far from done.
    1977 C-10 (my baby)...too many mods to list
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  5. #4 Re: BEWARE: Dumb question inside 
    GTX Level Member QUICKSILVER462's Avatar
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    Before you do anything to your a/c, put some gauges on the system first. Verify the compressor is engaged when the a/c is selected, radiator fans should be "on", and your ambient air temperature is reading correct and not to cold out for the a/c to turn on, I think if the ambient air temp is in the 40's, the a/c will not actuate at all.
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  6. #5 Re: BEWARE: Dumb question inside 
    GT Level Member Supercharged99's Avatar
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    Quote Originally Posted by QUICKSILVER462 View Post
    Before you do anything to your a/c, put some gauges on the system first. Verify the compressor is engaged when the a/c is selected, radiator fans should be "on", and your ambient air temperature is reading correct and not to cold out for the a/c to turn on, I think if the ambient air temp is in the 40's, the a/c will not actuate at all.
    Will do. When I tried to legitimately test the AC (I just got this car back in december) it was almost 70* outside so I don't think the lack of temps was my issue at the time but I'll definitely do some more investigating before doing anything else. Very well could be a compressor issue for sure. Thanks again for the tips.
    1999 GTP...stock for now
    2007 Suburban...far from stock
    1991 GMC Dually...74k original miles. Work in progress. Far from done.
    1977 C-10 (my baby)...too many mods to list
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  7. #6 Re: BEWARE: Dumb question inside 
    Donating Users bandook's Avatar
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    Does it blow a little colder on the passenger far side vent than the driver? That's a good clue that it needs topped off. I have to top mine off every couple years.
    Top Swapped 01 Imp
    VS (very small?) cam, SD Headers, 2.8" pulley, 29°, ported everything, E85, AEM water/meth, Deka 60's, HPT tuned
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  8. #7 Re: BEWARE: Dumb question inside 
    GT Level Member Supercharged99's Avatar
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    Quote Originally Posted by bandook View Post
    Does it blow a little colder on the passenger far side vent than the driver? That's a good clue that it needs topped off. I have to top mine off every couple years.
    No, warm/outside temp out of all vents when I attempt AC (heat works great lol). I have no idea when the last time the AC was serviced or when the last time it worked. Overall, it appears that this car was well taken care of but it’s possible that they ignored the AC if they were people who never used it or just didn’t want to fork over the money to maintain it.

    With this said, defrost does work and that uses the AC compressor, doesn’t it??
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  9. #8 Re: BEWARE: Dumb question inside 
    Donating Users bandook's Avatar
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    Defrost works? Like you get cold air from defrost? Yeah ac will always switch on with defrost. Do you hear the compressor click on and see rpm's drop when it does?
    Top Swapped 01 Imp
    VS (very small?) cam, SD Headers, 2.8" pulley, 29°, ported everything, E85, AEM water/meth, Deka 60's, HPT tuned
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  11. #9 Re: BEWARE: Dumb question inside 
    GT Level Member Supercharged99's Avatar
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    Quote Originally Posted by bandook View Post
    Defrost works? Like you get cold air from defrost? Yeah ac will always switch on with defrost. Do you hear the compressor click on and see rpm's drop when it does?
    Defrost does work and I use it almost daily during the winter in the mornings. With that said, I've not tried to push cold air through it because who thinks to do that when they're freezing cold

    But you bring up a good point about the RPMs dropping and all that. Now that you say that, I've not let the car idle and specifically listened for the compressor to kick on or for RPMs to drop. I've just seen the window cleared up and been happy and went back to thinking about rainbows and puppy dogs. So I need to do that and can check to see if the compressor is working. Thanks for the idea. For whatever reason that hadn't made it's way through my thick skull yet LOL
    1999 GTP...stock for now
    2007 Suburban...far from stock
    1991 GMC Dually...74k original miles. Work in progress. Far from done.
    1977 C-10 (my baby)...too many mods to list
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  12. #10 Re: BEWARE: Dumb question inside 
    Donating Users bandook's Avatar
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    You said it was 70° when you tested the ac, that's why I asked about the cold air.
    Top Swapped 01 Imp
    VS (very small?) cam, SD Headers, 2.8" pulley, 29°, ported everything, E85, AEM water/meth, Deka 60's, HPT tuned
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  14. #11 Re: BEWARE: Dumb question inside 
    GT Level Member Supercharged99's Avatar
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    Yeah, I know. It was my attempt at humor. On the break from winter we had where it was 70 one day I did not use the defrost that day because it was not needed. That's when I tried the AC and got nothing but warm air. The rest of the days it's usually 40* or lower.

    I will continue to look to see if the compressor is coming on or not and go from there.
    1999 GTP...stock for now
    2007 Suburban...far from stock
    1991 GMC Dually...74k original miles. Work in progress. Far from done.
    1977 C-10 (my baby)...too many mods to list
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