i looked thru the first 20 pages and couldnt find any problem like mine. sorry if someone already asked this.
my wifes a/c blows just fine except it only blows thru the defrost and floor not the main vent. any ideas would help! thanks in advance for your help!!

What year and make of car is this for? Hard to diagnose when we don't know anything about your car.

02 bonneville v6 no supercharger

oh yeah SLE

My first thought is a bad control head. Default mode for failure is blowing through the floor and defrost openings, but nothing through the vents.

Check vacuum lines going from engine to hvac unit.

The HVAC controls on your 97 are vacuum controlled. The HVAC controls on 2001 and newer are electrically controlled.

Okay thanks, I have been out of the HVAC field for a few years, but remember that the default is defrost/floor when vacuum is lost. I forgot the newer cars are mostly electric servo.
Sorry for the misinformation.