AC blows from Defrost and Floor on Bi-Level setting on the HVAC controller
I have a 1992 Buick Riviera. When I purchased the car the AC wasn't working so I never used the HVAC. I took it to the mechanic and he replaced all the vacuum lines under the hood, converted the AC to r134 and replaced a few other things. Well now that I have the car back the HVAC only bows out the defrost and Floor vents but will not blow out the dash vents. Just need a starting point of where to get this fixed. Thank you in advance.
