heat n a/c doesn't come out of the dash vents is it a vacum hose or the switchs are bad or something other then that
Dec 6, 2008 at 5:53 AM
JACOBANDNICKOLAS
✓Experienced Mechanic
110,246 POSTS
Hi:
It could be one or the other. The best thing to do is start at the engine and work your way through the firewall. Check all vacuum lines. There will be a hissing noise if you find the leak. If all lines are good, then move to the switch.