Thread: Air Conditioning fan cuts out at 3500 RPM

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  1. #1 Air Conditioning fan cuts out at 3500 RPM 
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    Has anyone else experienced this. Just got the car.

    Test 1

    Turn on Air Conditioning
    Turn on Re-circulation
    Rev engine to 3500 RPM + (enter expressway quickly)
    Air Conditioning shuts down
    Re-circulation light stays on
    reduce speed, engine less than 3k - 3.5k
    Air conditioning ramps back up, Re-circulation stays on.

    Test 2
    Turn on Air conditioning
    Turn off Re-circulation
    Rev engine to 3500 RPM + (enter expressway quickly)
    Air Conditioning shuts down???
    Re-circulation stays off - no light
    reduce speed, engine less than 3k - 3.5k
    Re-circulation turns on, light turns on and you can hear AC ramp up.
    Air conditioning is back up, Re-circulation stays on.
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  2. #2 Re: Air Conditioning fan cuts out at 3500 RPM 
    GTX Level Member tod1d's Avatar
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    solution don't rev so high, its actually a safety feature to protect fan, been around for at least two decades
    my last car, a 1991 Olds Eighty-Eight would do the same thing, found out the hard way once when I was speeding and it got very warm in the car until I slowed down

    2007 Pontiac Grand Prix
    http://www.cardomain.com/ride/2990036
    L26, CAI, HV3, ER Rockers, PLOG, Overkill Tune, flipped dog bones
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  3. #3 Re: Air Conditioning fan cuts out at 3500 RPM 
    SE Level Member 1fastgtp's Avatar
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    welcome
    2000 Grand Prix GTP: Modifications: SLP catback exhaust-SLP Headers- 180 Termostat- wizaired cold air intake-PRJ 10.4mm wires- autolite 104's- zzp tune- full size intercooler- vs cam- 3.0" pulley ETC. Fastest Grocery Gitter in town
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  4. #4 Re: Air Conditioning fan cuts out at 3500 RPM 
    GTX Level Member QUICKSILVER462's Avatar
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    There is a check valve that keeps the vacuum in the vacuum resivour when pressure on the engine side rises (heavy throttle), or there might be a vacuum leak on the resivour side of the system.
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  5. #5 Re: Air Conditioning fan cuts out at 3500 RPM 
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    yup AC supposed to cut off at WOT isnt it?
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  6. #6 Re: Air Conditioning fan cuts out at 3500 RPM 
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    Quote Originally Posted by Justintiime View Post
    yup AC supposed to cut off at WOT isnt it?
    Yep. Actually happens all the time for me with the stall. Get's rather annoying.
    No More GTP for me.

    2014 Chevy Cruze ECO Manual. 40+MPG
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  7. #7 Re: Air Conditioning fan cuts out at 3500 RPM 
    Turbo is the way to go. BillBoost37's Avatar
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    FWIW that can be reprogrammed.

    It's done that way to give you max power. Clearly if you are over 70% throttle, you are asking for everything it's got.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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