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: 139,804 (10,000–267,000)
10 model years affected: 1993, 1996, 1997, 1998, more1999, 2000, 2001, 2002, 2003, 2005
71 people reported this problem
38 people shared problem details
warm air on driver side and cold on passanger
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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.
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hot air on driver side and cool air on passenger side how can this be fixed
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hot air rt side cold air left side
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My controls are stuck in the defrost/floor mode.
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HEATER NOT SWITCHING OVER TO BLOW HOT AIR BLOWS COLD AIR ON FLOOR.
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Hot air on the driver side, cold on the passenger side.
Air flow out Dash and floor only. Looking for a fix! I have not fixed it yet and was wondering where to start.
ac works good the problem is that air come on downside only. what causes it?
driver side warm pass side cool ,not repaired
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
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.
blows out hot air on driver side and cold out the passenger side
hot air rt side cold air left side
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.
Hot air at drivers seat and cold at r/h side
cold air out drivers side hot air out pass side with a/c on
I'm only getting heat no a/c
05 Bonneville blowing cold outa pass side n heat on left side
Air only blows out defrost and floor vents. Cannot run A/C the vents only blowing from those locations. A/C worked fine before this happened, when I could manually change from dash to floor to defrost, etc.. I was told that the blend door actuator is likely what has failed and is causing this problem. Hoping to find a do-it- yourself fix.
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