Heater only blows cold air

1989 BUICK LESABRE
300,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC
Avatar
BUICK8989
  • MEMBER
  • 1 POST
Put antifreeze in but still no heat only blows out cold air. Don't know what is going on with my heating. please help?
Feb 7, 2020 at 4:38 PM
Advertisement
Avatar
KASEKENNY
  • CAR REPAIR CONTRIBUTOR
  • 18,907 POSTS
We need to check the blend door actuator which is what controls the air being directed over the heater core. This is what is needed in order to get the air hot. Your actuators are run by vacuum lines so if this is cracked or disconnected then the actuator will not move the door position.

Take a look at these attachments and let me know if you have questions. Thanks.
Images (Click to enlarge)
Attached Media
Attached Media
Mar 22, 2021 at 12:59 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.