Question about 2003 GMC Envoy

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Driver side a/c blows hot air while passenger side blows cool on 2003 monte carlo

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There is a actuator motor that controls this,and it is not working,the dash has to be removed to replace it,and if this was at all helpful,please rate,thank you.

Posted on Jul 16, 2010

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I have a 2003 Monte Carlo SS. The dual climate control doesn't seem to work properly. With AC going, passenger side blows cold air but the drivers side blows warm air as if it is set for "vent". I replaced...


check the actuator motor and make sure it is moving the doors between the heater and the ac. it is in the center of the heater inside the car and is a small motor attached to the heater housing.

Jun 06, 2014 | 2003 Chevrolet Monte Carlo

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2003 chevy monte carlo passenger side cooling fan not working


The passenger side fan should only come on while driving at highway speeds, to offer additional cooling help to cool down car, the Driver side fan is for when parked, ideling, city traffic, and air conditioner use. At least that is what i was told.

Jul 07, 2012 | 2003 Chevrolet Monte Carlo

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Driver side heat blows cool air passenger side blows hot air. Both thermostats are on hot, recently had no heat flushed radiator and got half heat


Hello, this is cused by the drivers side temp door actuator. there are two electric motors that move the temp doors from cold to hot. there is one on the drivers side and one on the passenger side. you will need to replace the one for the drivers side.

  • Remove the left instrument panel (I/P) insulator.
  • Remove the knee bolster bracket bracket. Disconnect the electrical connector from the left air temperature actuator.
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  • Remove the left air temperature actuator.
  • Nov 06, 2010 | 2004 Chevrolet Monte Carlo

    1 Answer

    I have a 2004 monte carlo and my driver side heat does not work it blows out cold air even when the control switch is on the heat my passenger side works fine


    Hello and welcome. this is caused by a bad temp door actuator for the drivers temp door. you will need to replace the drivers temp door actuator. this is a electric motor that moves the temp door from cold to hot and hot to cold

    Oct 23, 2010 | 2004 Chevrolet Monte Carlo

    1 Answer

    When I turn on the heater or defroster, the left side vents blow cool air while the right side vents blow hot air. what could the problem be?


    there is 2 electronic damper controls for driver and passenger heat and cool controls directly in the middle of the car under the dash near the floor. They move the damper for temperature control up and down when you slide the switch. One of them probably got stuck or just died. same thing happened to me but mine was just stuck and I had to free it up. hope this helps

    Oct 09, 2010 | 2005 Chevrolet Monte Carlo

    1 Answer

    The two vents on the driver's side won't switch to AC


    Sounsds like the HVAC is dual system, and the door motors have failed, try swapping the door motors with the door motors that work on the passenger side.
    If they work, the control head may be the issue, try and test the output of the control head, see if there is a signal to the motors, getting a wiring schematic will help in this matter.

    May 25, 2010 | 2003 Chevrolet Monte Carlo

    1 Answer

    Driver side heat blows cool air passenger side blows hot air


    Hello. The side that is not operating properly has a bad temp door actuator located up under the dash. I am assuming this vehicle has driver/passenger(dual)climate control heat and cold settings. This is a very common problem on these vehicles. Hope you find this information useful!

    Sep 17, 2009 | 2004 Chevrolet Monte Carlo

    2 Answers

    Where in the heck is the radiator fuses on a 2003 chevy monte carlo SS. The passenger side fan motor has quit but is showing it has power when tested with a testing light?


    if you have power there then the fuses are good or relays but if you have power then you ethier have a bad fan or ground wire also that fan should only come on when the ac is on

    Aug 27, 2009 | 2003 Chevrolet Monte Carlo

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