Question about 2006 Mercury Grand Marquis

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Ac blows out of different vents

My AC works well but it switches between floor, vent and defrost. It does it on auto and if I select the vent.

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  • Contributor
  • 35 Answers

It has a vacuum leak,Either under hood going to vacuum ball.
Vacuum ball is a vacuum storage tank. Or vacuum leak at back of control switches. Hope this helps!

Posted on Apr 13, 2014

  • 3 more comments 
  • brett eller
    brett eller Apr 13, 2014

    That would make it bounce back and forth and leave no control? I am talking for hour after hour at random?

  • john fitzpatrick Apr 13, 2014

    Probably Vacuum Ball or canister, I'm not sure on a 2006. But if it has a canister,It will be under

  • john fitzpatrick Apr 13, 2014

    The hood it will look like a metal quart grape fruit juice can.

  • john fitzpatrick Apr 13, 2014

    On the inner fender uder hood,If its a ball type.Its a plastic ball,Check the vacuum line going to it!

  • john fitzpatrick Apr 13, 2014

    Here,https://www.google.com/search?q=2006+mer...

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Posted on Jan 02, 2017

Ajkill
  • 2035 Answers

SOURCE: 2003 Grand Marquis

Check if the ac vent is blocked or the switch may in off position ,or selected the AC position on the ac control.....if does not help get it checked by the service center..............

Posted on May 29, 2008

justuscc
  • 360 Answers

SOURCE: 1996 mercury grand marquis gs dash blower switch

heres the electrical diag.....58909880

Posted on Oct 09, 2008

  • 1 Answer

SOURCE: AC will not come out the dash vents all the time.

my ac vent only comes out of the defroster and the floor i replaced the vent door accuator but that didnt work what could be the problem 2004 gand marquise

Posted on Aug 23, 2009

  • 4336 Answers

SOURCE: Ac blows through defrost only

Your Heater and A/C system is designed to fail in defrost mode. Look for vac issues, and cable issues.

Posted on Sep 09, 2010

  • 4336 Answers

SOURCE: ac system goes to the defrost vent when on max ac

Heater ducting is designed to fail in defrost mode. Look for lose or leaking vacuum hoses. The you investigate the controls, then the heater / A/C box...

Posted on Sep 17, 2010

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1 Answer

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1 Answer

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1 Answer

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