AIR BLOWS FROM HEATER THROUGHOUT DASHBOARD BUT NOT ON WINDSHIELD

1996 GMC SAVANA
150,000 MILES • 5.0L • V8 • RWD • AUTOMATIC
Avatar
BOYCEBURNS
  • MEMBER
  • 1 POST
MY HEATER BLOWER MOTOR WORKS GREAT, BUT WE ONLY GET AIR FLOW THROUGH THE DASH VENTS AND CANNOT GET IT TO THE WINDSHIELD
Mar 13, 2015 at 2:02 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
You need to check actuator for defrost under the dash.
Mar 13, 2015 at 2:40 PM
Advertisement
Avatar
JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
Just to add, see if defrost door will operate. Note the diagram. At the moment I can't tell if door is cable operated or vacuum? I'll have to check for hvac vacuum if vacuum operated.
Image (Click to enlarge)
Attached Media
Mar 13, 2015 at 2:56 PM
Avatar
JDL
  • CAR REPAIR CONTRIBUTOR
  • 16,098 POSTS
My info on this talks about defrost cable, check the cable and defrost door attach point.
Mar 13, 2015 at 3:02 PM