Question about 1999 Pontiac Grand Prix

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1999 pontiac grand prix gtp dual airconditioning problem, driver side air condition is blowing hot passenger side blowing cold

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  • Anonymous Mar 17, 2014

    i have a 1999 pontiac grand prix with dual controls heater system and the passenger side blowers nice hot air but only blowers cold air on drivers side any ideas why

  • Anonymous Mar 20, 2014

    dual climate control not blowing as strongly as passenger side. disconnected neg btty terminal and successfully solved issue. however, now makes a whooshing sound. is NOT blowing cold on one side and hot on other.

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  • Pontiac Master
  • 6,826 Answers

Two things can be the problem,first,try adding ,a little freon,if it is low,it will only cool one side,then if this does not help,there is a door actuator motor that controls this,it could be not working,the dash has to come out to replace this actuator motor,if this was at all helpful,please rate,thank you.

Posted on Jul 13, 2010

  •  Expert
    Expert Oct 22, 2010

    Cold one side, hot other, it is absolutely the actuator door. I had this replaced on both of my Grand Prix with Dual AC. It is not an easy fix.

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