2007 Mercury Marquis

Tiny
CARLUN
  • MEMBER
  • 2007 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Still cooling but blow on floor and not through the vents; but sometime will blow through the vent but just briefly
Sunday, April 11th, 2010 AT 5:40 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
In this case you are looking for a vacuum leak. The vent doors are actuated by vacuum. If it is too low, it won't switch air flow direction. Check under the dash and the hood for leaks. Sometimes, you will hear a hissing sound with the engine running from the area that is leaking.

Let me know what you find.
Joe
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Thursday, June 10th, 2010 AT 7:31 AM

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