my heater works but when i push the defroster it switches to vent what do i do to fix this/
Dec 15, 2008 at 4:15 PM
1996 Cadillac Deville
1996 CADILLAC DEVILLE
WHITETIGER_1272
- MEMBER
- 2 POSTS
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JACOBANDNICKOLAS
- ✓ASE Certified Mechanic
- 110,194 POSTS
Hi:
There are vent doors in the HVAC duct work that are actuated by vacuum. You will need to check for a vacuum leak at the switch or see if you can hear a hiss coming from anywhere under the dash.
Let me know what you find.
Joe
There are vent doors in the HVAC duct work that are actuated by vacuum. You will need to check for a vacuum leak at the switch or see if you can hear a hiss coming from anywhere under the dash.
Let me know what you find.
Joe
Dec 18, 2008 at 9:56 PM
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