Close
Car Questions
RepairPal is your advocate for car care advice and guidance

Heater

(1990 Buick LeSabre)
in Luverne, MN on November 07, 2010
hello my heater only blows out the bottom but when i put the ac on it will blow out the bottom vent's and the defrost what do i do? thanks
Ask a Question
Displaying 2 answers & 0 comments
Popular Answer
on November 07, 2010
Take a look underneath your dash for any disconnected or damaged vacuum hoses. You likely have a vacuum leak that is keeping the vacuum driven motors that turn the doors inside your dash for ventilation control from working.
Sign in to reply
on November 23, 2010
Check the three way tee on the firewall. You will find it following the vac hose from the cruise servo check for leaks.
Sign in to reply
Get a repair estimate
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide.
Or interested in getting a repair? Find a Shop

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
Heat blows but its cold air seats are heated but defrost and heat is cold air whats wrong
The rest of my push buttons in my car work & light up except the heater & ac part.
Didn't find what you were looking for?