Question about 2002 Pontiac Grand Prix

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Heat /ac fan doesn't work properly

Have a 2000 grand prix with manual heat and ac, when working it doesn't blow except on high. Also funny thing with auto headlights they go off when you turn the fan on, whass- up- wit- dat !

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  • nikki_djor69 Jan 01, 2009

    Not absolute same problem but my blower and headlights shut off together.... super gay.... perhaps they're related. How on Earth do you check relays/ the circuits????????????????

  • planetlouis Jan 04, 2009

    i got a very similar problem. the vents won't work after the engine is started. they may turn on by itself however after some time say 5, 10,15 minutes. kind of delay but not fixed timer. 


    this 'delay' also effects the lights: the lights won't turn on automatically in a dark situation until some time passed (or manually turned on).


    this 'delay' effects the rear defrost key as well...


    I checked the fuses they all look good.


    Anybody has an idea is appreciated.


    Louis from Toronto 



     

  • katfoults Jan 12, 2009

    I have the same problem I have been trying to fix through a mechanic, fan only works on high and otherwise once you turn the fan it turns off the lights. I have replaced fan motor, sensor and climate control panel and still wont work correctly, its a freakish thing and no one knows how to fix.

  • Anonymous Jan 15, 2009

    exactly same problem



  • Anonymous Jan 22, 2009

    same ******* problem!!!!

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  • 962 Answers

Check the relay for the blower. it may be locked . tap it lightly or jiggle the relay or check with a known good relay.this two circuits may be interconnected. check the light relays as well and fuses.

Posted on Nov 30, 2008

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2000 pontiac grand prix the ac blower stopped working we replaced it and still doesn't work it just comes on one in awhile. after replacing blower motor, then power door locks stop working replace


All these problems do sound as electrical of course but ecerything that you have mentioned is all on separate circuits which is odd. More than likely the blower motor situation is the resister. The window problem could be a number of things but I can tell you that all the wiring goes through the main drivers swtich so it could be just that switch but of course you would need to test before you just go out and but one but it is a common problem. The lights could be several things as we;; but would check the ambient light sensor which is located up in the center dash near the light that flashes for you security. You car didn't happen to get wet on the inside ? In any case I hope this helps.

Oct 24, 2012 | 2000 Pontiac Grand Prix

1 Answer

2000 pontiac grand prix ac problem


If the compressor is working, a mechanic would check the low and high gauge pressure.
The freon has to flow thru the system to work, and the cooling fan draws air thru the condenser to get rid of the heat from inside the car.
If the ac clutch is working but the gauges show equal pressure, the compressor may be faulty.

Jul 16, 2012 | 2000 Pontiac Grand Prix

1 Answer

I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital...


I have a 2000 pontiac grand prix with a digital climate control system. The heat quit working, it doesn't blow out any heat. Now that it is warm outside the air stopped blowing out any air. The digital temperature on the climate control is not correct. When it states that it is below 30 degrees on the ext and it is warm outside the air wont be cold. Once it starts going above 30 degrees the air gets colder. Today the blower stop working all together. Was told it maybe the climate control unit was bad. You can hear the door opening/shutting when you switch the temp from cold to hot. But there was no heat blowing out whatsoever in the winter time. Could you please give me your opinion on whether or not it is the climate control unit or something else?

Jul 11, 2011 | 2000 Pontiac Grand Prix

1 Answer

My 2001 Pontiac grand Prix GT fan blower doesn't


sounds like the blow motor resistor it should be located somewere near the blower maybe. under passenger side dash.....it will be a wide plastic plug with about 4 or 5 wires..

May 23, 2011 | 2001 Pontiac Grand Prix

1 Answer

2000 pontiac grand prix,heat/ac does not blow out...when it does its for about 30 sec. before it shuts off again,also it only comes on at 5(highest setting)


this could be one of two things .1 a bad blower motor resistor .2 a bad blower motor. if the blower motor resistor is bad i should work on high all the time.

Jun 24, 2009 | 2000 Pontiac Grand Prix

2 Answers

2000 grand prix fan speed


i have been having that same exact problem with my 2002 grand prix for over a year now, and when my ac is on the lower setting the it doesnt work plus the headlights and lights on my dash go out. On Max everything works. i changed the blower resistor(about $35), still doesnt work. i changed all relays and fuses related to the ac, still doesnt work. i changed out the actual ac control switch in the dash, still doesnt work. i have changed everything but the blower motor and have asked every mechanic and auto parts retailer i come across and no one knows the answer. The best answer i got is that it is probably a wiring problem like a short somewhere.

May 28, 2009 | 2000 Pontiac Grand Prix

1 Answer

Fan speed only works on #5


Is # 5 the high setting ? if so then you blower motor resistor is bad

Jan 11, 2009 | 2000 Pontiac Grand Prix

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