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Pontiac Bonneville Heating/Cooling Problems

231 messages,  Last post on Feb 13, 2013 at 8:44 PM

You are in the Pontiac Bonneville Forum.

What is this discussion about? Pontiac Bonneville, Heating / Cooling, Sedan

Messages Page 21 of 23

#201 of 231 Re: no air at main vents [pooh4949] by imidazol97

Jun 03, 2011 (6:23 pm)

Replying to: pooh4949 (Jun 03, 2011 4:51 pm)
Are you able to hear doors move inside the heater box when you change from defrost setting to floor and to floor/windshield? And when you switch the recirculate button on?
 
You might run the motor and then turn it off; there should be vacuum stored in the tank behind the right front headlight under the fender and you can hear the doors move.
 
If you do hear movement, then you probably have the collapsing nipple inside the soft plastic connector on the corner of the programmer box on the edge of the HVAC box under the dash. Here's how to replace it.

 
I'm told the 7/16 inch vacuum line is the right size to connect the ends of the plastic vacuum lines. I used something else when I did mine. Plastic tubing such as for aquariums does not fit tightly enough.
 
If no movement, you may have a vacuum line off, split open, dry rotted, etc. Or the vacuum bottle under the fender may be cracked and not storing vacuum.
 
I believe your vacuum tube layout on the engine is like my 98. The 92-95 had a vacuum line to the firewall to the storage bottle and those kept getting disconnected when people put their arm in to do things with spark plugs on the back of the engine.

#202 of 231 1996 Pontiac Bonneville Low air flow from all vents setting by santonio03

Jul 09, 2011 (11:50 am)

Clean Evap core, replace Blower and resistor. All the settings work(from defrost to vents to floor)

#203 of 231 96 Bonneville Blending Actuator Motor by phr04

Oct 12, 2011 (9:14 am)

The instructions for replacing this motor seem to indicate that it can be reached by removing the instrument panel cluster. I have done that and am still a long way from even being able to see the actuator. It appears that the entire dash panel assembly, including the air ducts must be removed. Is this true, and can I find step-by-step instructions for doing this?
 
PHR004

#204 of 231 Re: 96 Bonneville Blending Actuator Motor [phr04] by imidazol97

Oct 12, 2011 (11:10 am)

Replying to: phr04 (Oct 12, 2011 9:14 am)
> It appears that the entire dash panel assembly, including the air ducts must be removed.
 
No. It can be done by removing the underdash hush panel (thin plastic) and taking off the glovebox door.
 
If you want to email my email given in my profile (click on my user name at top of this post), I'll try to link you up with some help.
 
The Bonneville has a different dash structure in that area than the leSabres. Yours is harder to get to.
 
First, you need to verify that the electric actuator is not moving correctly, by looking through the hole in the brace behind the glovebox where you can see the rod that the actuator uses to move the door. If you find the actuator is bad, it can be removed by taking off two short screws--but they do it by feel since they're next to impossible to see.
 
What happens is the actuators have a plastic gear inside that splits so it's not pressed against the hub and slips. The hub is what moves the actuator rod.
 
I removed mine and glued the gear to the actuator. But mine is easier to replace if it breaks or slips again. So I decided I might not own the car by the time it comes loose from the plastic instant glue.

#205 of 231 98 Bonneville Blend Door Actuator Access by ac82

Nov 20, 2011 (6:59 pm)

I am in the process of replacing the blend door actuator on my 98 Bonneville. I can not access anything behind the glove box so I removed the cover off the blend door / A/C coil box to get to the actuator motor...Now I can't get it to go back under the dash...It came out so I know it has to go back in! I am at my wit's end. I would appreciate any help!

#206 of 231 Access to Programmer control by budjenning

Nov 30, 2011 (3:48 pm)

I'am having problem removing the programmer. I have removed the cover under the programmer, and the glove box, and can't seem to get any futher. I see the tubes going into the box, but now I still can't remove it.

#208 of 231 Blower motor not working 98 sse by diytosave

Feb 29, 2012 (6:55 pm)

I have a 1998 sse Boniville the blower motor would quit intermeditley now it quit working. I check the motor by running wires from the battery and it works great. Controls inside the car show the blower on any speed but nothing i have checked all fuses I show about 9.5 volts in the wires going to the motor. I have digital controlls. is that enough voltage? I don't know where the blower motor control mod is? or if that is even the problem or if the voltage is to low. I do know that there are three computers that control that system. Any help would be great as it is the wifes ride and I'm in the dog house untill i get it fixed.

#209 of 231 Re: Blower motor not working 98 sse [diytosave] by imidazol97

Feb 29, 2012 (7:25 pm)

Replying to: diytosave (Feb 29, 2012 6:55 pm)

 

 
The location is where shown. Follow the wires from the blower motor up. The relay center above the blower control module is held by two screws. Remove those and it can be pushed upward with slack on the wires and give some room to get the BCM out of the airbox.
 
The module is electronic. They will show voltage but no current. If the blower runs when connected directly to the battery on a fused line and with a ground, then you're probably needing the BCM for roughly $100? Available at Rockauto.com and other local box stores.
 
If you do not have the digital speed control on the blower, then the same location would have a resistor set that gives three speeds.
 
The only other possible problem is burnt contacts on the connections due to high heat. So take a look.

#210 of 231 A/C Vent problem 2003 Bonneville by sea_lifer

Mar 27, 2012 (6:51 am)

Trying to figure out what could possibly be wrong with my wifes car. When the A/C is on the cool air blows out from the floor vents just fine ( I think ). When you push the button to go to the vents on the dash board, the air coming out of the vents on the passenger side comes out cool but on the driver side there is a noticeable (hotter) difference. Does anyone have any idea what could be causing this. I thought it might be the blend door actuator, but the air itself is being diverted correctly, the only problem is the temperature of the air on the drivers side vents on the dash when it is on A/C. Any help that anyone can provide will help out immeasurably.

Messages Page 21 of 23

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