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2000 Mercury Marquis

Tiny
DIETRICH
  • MEMBER
  • 2000 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
The heater core is working I can feal it getting hot and blowing slight warmth while sitting still but the air is cold when you drive. It seams like the door to change from cold (vent) to heat is not opening or closing
Tuesday, November 11th, 2008 AT 12:51 PM

1 Reply

Tiny
VOLTS
  • MEMBER
  • 16 POSTS
Hi
The most likely cause from what you describe, would be a vacuum leak with the Heat/Cold Air Door, could be a leak in one of the vacuum lines or the vacuum motor that controls this door.
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Sunday, January 4th, 2009 AT 10:41 AM

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