Hot air drivers side


New member
Buick Ownership
95 Riv
I have hot air blowing from the drivers side and lower vents. I had a similar problem last year and a freon charge fixed it, but this is a bit different. The colder I set the temp control the hotter the air gets, even on vent setting. When I move the temp setting to 90 it still comes out hot but the right side vents seem to close off. Will my scanner be of any help diagnosing rhis problem?


Full Member
Oakland Gardens, N.Y.
Buick Ownership
98 Riviera, 70 GS455 Stg1
There are 3 or 4 actuators. The actuators have small electric motors and plastic gears, and that is what moves the climate control doors. One or more of them are broken. The electric motors give out, or more frequently, the plastic gears break. Whatever position the door is in at the time, well, it stays there. Dorman makes replacements.

1995 BUICK RIVIERA 3.8L V6 Heater Blend Door Actuator | RockAuto

See this thread on BTW, the best site on the planet for the 95-99 Riviera.

Write-Up: HVAC Assembly