My heater works but when I push the defroster it switches to vent what do I do to fix this/
Monday, December 15th, 2008 AT 4:15 PM
1 Reply
JACOBANDNICKOLAS
MECHANIC
109,645 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.