1979 Buick regal air only coming from floor vents

Torrez2022

Not-quite-so-new-guy
Apr 15, 2022
5
1
Need help need help trying to fix my car just put in a new heater core and the air only coming out of the floor vents
 

airboatgreg

Comic Book Super Hero
Oct 2, 2016
2,747
113
Leaking or no vacuum. Check vacuum to softball size reservoir first. Crank engine to see if you hear a hissing noise
 

ELCAM

G-Body Guru
Jun 19, 2021
710
93
Once you determine you have vacuum to the system I would focus on number 4 and 5 and be sure the control is operating them properly.

G HVAC 3.jpg
 

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