HVAC Mode/Temperature Door Actuators May Fail on Pontiac Bonneville

The mode and temperature door actuators may fail causing improper air flow or temperature output from the heating and AC (HVAC) system.

RepairPal Verified
Average mileage: 139,862 (10,000–267,000)
10 model years affected: 1993, 1996, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2005
54 people reported this problem
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
Viewing 1 - 20 of 42 problem details
2001 Pontiac Bonneville 167,890 mi,
hot air on driver side and cool air on passenger side how can this be fixed
1998 Pontiac Bonneville 141,000 mi,
Will only direct air out of defrost and floor, not the front vents unless driving for a long time, and then only a minimal amount comes through. Once the car is parked, it vents through the defrost and heater again. Inspected vacuum pots under dash, couldn't find leak. Verified that engine vacuum was present. There is a control module that 6 small, multicolored lines connect to under the passenger side. This is where the automatic climate control designates which line has vacuum to actuate the controls for delivery. I wasn't able to do anything with it however. Still researching the issue.
warm air on driver side and cold on passanger
2000 Pontiac Bonneville 223,000 mi,
Air flow out Dash and floor only. Looking for a fix! I have not fixed it yet and was wondering where to start.
2000 Pontiac Bonneville 267,000 mi,
My controls are stuck in the defrost/floor mode.
2000 Pontiac Bonneville 100,100 mi,
hot air rt side cold air left side
2002 Pontiac Bonneville 185,000 mi,
Hot air on the driver side, cold on the passenger side.
2001 Pontiac Bonneville 112,000 mi,
Air blows cold on passenger side and hot on drivers side. Can this be temp blend door actuator or is it the drivers side actuator? Where are they and how do you replace the drivers side?
2001 Pontiac Bonneville 210,000 mi,
Will not switch from air to heat.
Blowing cold air drivers side warm air passengers side. How do I fix the problem??
1997 Pontiac Bonneville 187,000 mi,
The blower motor was replaced due to vibration and squealing. Prior to this I couldn't get any volume of air to come out in any setting. After changing the motor I can hear the motor changing speeds but still no air coming out. Compressor cycles and heater control switch seems to shift.
2001 Pontiac Bonneville 118,000 mi,
ac works good the problem is that air come on downside only. what causes it?
1997 Pontiac Bonneville 86,000 mi,
My air won't blow cold and. Only blows out floor vents defrost vents and rear vents in the back seat have not fix yet still don't know what to do
2002 Pontiac Bonneville 143,000 mi,
blows out hot air on driver side and cold out the passenger side
2001 Pontiac Bonneville 111,000 mi,
driver side warm pass side cool ,not repaired
hot air rt side cold air left side
1999 Pontiac Bonneville 250,000 mi,
I have to ruin the air on max because the other fan settings doesn't work at all. I think it should also blow harder.
had the air serviced in july . last week it slowley started blowind warm then hot everything but cold . took it back today they said it probably was electrical
2002 Pontiac Bonneville 20,000 mi,
Hot air at drivers seat and cold at r/h side