Remove glove box locate the blend door actuator black odd shaped box with metal ring.
1998 buick regal blend door actuator.
Same problem on my 98 regal gs.
If you get cold air it s the actuator you removed.
Have done some research and almost everything leads to the blend door actuator.
Heater blend door actuator connector.
An actuator can go bad in of two ways.
1998 buick regal 6 cyl automatic on my 98 buick regal the air conditioning blows cool air on the drivers side and hot on the passengers side when i turn on the dual control.
The blend door actuators in a buick are electrically operated by blend door motors.
I did purchase a air door actuator but can t find it.
No parts for vehicles in selected markets.
A computer assigned to this duty controls the blend door actuators.
Buick 1998 regal 3 8l v6 supercharged heat air conditioning heater blend door actuator.
Heater blend door actuator connector.
First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or.
1998 black silver regal gs 140 000 mi credit goes to where i originally found the solution cannot remember where on the web read practically every post on this board concerning the blend door actuator but it worked like a charm for me so if it helps someone get the ac back with summer upon us then it may help.
Remove the box and manually turn the blend door shaft it was attached to.
These are tied into several sensors that detect the outside temperature to compensate for incoming air inside air temperature and even a sensor to signal when a door.