1998 Mercury Mountaineer HEAT BLOW FROM DEFROSTER

Tiny
MISSYBOO
  • MEMBER
  • 1998 MERCURY MOUNTAINEER
  • V8
  • 4WD
  • AUTOMATIC
  • 125,000 MILES
IF AIR CONDITIONER IS OFF OR ON HEAT IS BLOWING FROM THE DEFROSTER. WHEN I TURN A/C ON HEAT IS ONLY BLOWING FROM THE DEFORSTER AND NOTHING FROM VENTS.
Saturday, November 29th, 2008 AT 1:55 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi:
There are vent doors in the HVAC duct work that direct the air to different places. They may not be working correctly. You will need to remove the duct work and check if any are stuck or broken.
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Monday, December 15th, 2008 AT 12:03 PM

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