1998 Mercury Mountaineer HEAT BLOW FROM DEFROSTER

1998 MERCURY MOUNTAINEER
125,000 MILES • V8 • 4WD • AUTOMATIC
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MISSYBOO
  • MEMBER
  • 1 POST
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.
Nov 29, 2008 at 1:55 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
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.
Dec 15, 2008 at 12:03 PM
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