Last post on Feb 13, 2013 at 7:44 PM
You are in the Pontiac Bonneville
What is this discussion about?
Pontiac Bonneville, Heating / Cooling, Sedan
#145 of 231 Re: hvac doesnt work at all [cmazeo]
Oct 04, 2009 (6:44 pm)
>Ok I screwed up.
Welcome to the club. At least you didn't "break" anything being backwards. I tend to break things that weren't already a problem.
This is what the factory service manual looks like and it is two manuals. This one is the Helm manhal.
try searching for combinations of factory, service, bonneville, pontiac, and see if you come up with some that aren't completely labeled.
Helm manual for GM
Try searching for combinations of factory, service, bonneville, pontiac, and see if you come up with some that aren't completely labeled.
here's one under 2000 bonneville service manual (no word factory) and it's $5 current bid 20 hours to go and $15 shipping.
here's one for $9.99 and 9.99 shipping bid current.
Make sure both manuals are there.
I didn't look under Pontaic without the bonneville word...
As for the circuits, I think studying the manuals will help.
Check the cabin air filter intake for the blower motor. If there's a filter it may be stopped up. See if the blades for the fan rotate freely while you have the filter out (you can easily see the blades when you're servicing the cabin filter out on the firewall.
#146 of 231 Re: hvac doesnt work at all [imidazol97]
Oct 05, 2009 (3:59 pm)
I ordered a set of service manuals from ebay today.... cost about $ 27 with shipping. Should be here in a few days. Thanks again for the help. Will let you know how everything turns out. There are a few things wrong with the car .. so this should help.
#147 of 231 Re: a/c or heat blower vent changes on acceleration [imidazol97]
Oct 11, 2009 (8:05 am)
Man, you gave me the whole breakdown. Thanks dude, and I will let you know how it works out. I have been kind of busy so I just got a chance to look at the website again, but I am glad I did. I'll get back to you after my investigation.
#148 of 231 Proublems with heat and cooling system on a 1997 Bonneville - it heat
Oct 15, 2009 (1:40 pm)
I own a 1997 Bonneville - it heats the inside at start up - couple of minutes later - it turns on the air - two mechanics are left shaking their head - while saying I have never seen it do this before, have you - what was the cause?
#149 of 231 Heating Control Not Working Correctly.
Dec 06, 2009 (8:16 pm)
I own a 1997 Bonneville. My heating does not work correctly since I had a total loss of power. I had removed the battery to charge it then put it back in. Since this happened I had a technician test the battery and charging system, both tested okay. He said the loss of power was caused by a badly corrodid battery terminal which he replaced. The control is temp controlled and when I set it for heat it just blows cold air. Some times shutting the vehicle off and restarting it corrects the problem. The other thing I have noticed is the Temp indicator flashes 2 to 3 minutes then stays on solid, this happens every time the car is started. Is there something that needs reset to correct this problem or is this an indication of some kind of component failure? The technician could not find anything about the flashing temp indicator and suggested I take the vehicle to a dealer for service.
#150 of 231 Re: Heating Control Not Working Correctly. [popsydoodle]
Dec 07, 2009 (3:10 pm)
My guess from a distance is that when you disconnected the battery, you did not turn off the AC unit first by turning the key ON and then shutting off the AC with the off button.
You might try moving the temp all the way cold for a minute and then put it all the way hot for a minute and see if it's able to recalibrate itself.
Otherwise you may have a cracked actuator gear. The actuator is a little electric motor that moves a lever that is the temperature blend door inside the heater box. If the gear is cracked, it slips on the axle. Therefore the programmer box doesn't know that the arm isn't moving even though the electric motor thinks it is moving it.
You may take off the plastic panel above the passenger's legs. Take off the glovebox door by removing screws along the bottom hinge. Then watch the white plastic arm sticking out of the heater box connected to the actuator motor on top of the heater case.
On Pontiacs those actuators are supposed to be difficult to get to the two screws holding it on.
There may also be an actuator moving an arm on the bottom of the HVAC case that is from an actuator that's inside the programmer box. Does your car have separate controls for passenger and driver temperatures?
#151 of 231 Re: Heating Control Not Working Correctly. [imidazol97]
Dec 09, 2009 (3:52 pm)
I do not have seperate controls for driver and passenger, just the main control on the dashboard above the radio. I didn't know that you need to shut off the AC before removing the battery. I will try the recalibration first and let you know if that works? Thank you for your response to my problem.
#152 of 231 Re: Heating Control Not Working Correctly. [imidazol97]
Dec 16, 2009 (7:50 pm)
I did try the calibration you suggested and it's not working. Although I discovered if I follow the calibration you gave me after the thermostat starts to register it will blow warm air and get warmer as the engine temperature rises. On occaision this method doesn't work until I shut down the car and restart it. Could the failure of the actuator arm have caused the vehicle to shut down and loose all power? I guess the next step is to look at the actuator arm. Will get back to you after I get a chance to observe. Thanks again for the tips.
#153 of 231 no heat or air in in a 98 bonneville se
Dec 20, 2009 (7:23 am)
My wife has a 98 bonneville se and the heat is not working. It worked fine last week but the other day it would not come on. I played with the knobs and switched it over to air conditioning and all of a sudden it started to blow even switching back to heat. Defrost, floor, upper body, they all worked. Now this morning it would not work no matter what I did. I thought first maybe fuses or relays.Even a heater core but I had one go out in a berretta and the floor was soaked. You can hear it pressurize when you switch it from defrost to heat but blows nothing. What could be the problem?
#154 of 231 Re: no heat or air in in a 98 bonneville se [98bonneville]
Dec 21, 2009 (9:15 am)
A question. Are you saying the blower motor does not work--there is no sound of rushing air and you can't change the speeds and hear the motor change?
If so, there are two possible problems besides a blown fuse.
#1 is the blower motor is dying. Try tapping, gently, on the bubble shape housing for the blower motor on the firewall behind the motor with the ignition on (engine off) and the blower speed set to blow. If the vibration starts the blower, then most likely you need to replace the blower motor. AFtermarket stores have them. It's about 5 screws and a connection to replace.
#2 is that the blower control module for the automatic speed system or the resistor pack for the manually controlled speed system is acting up. The automatics are a power transistor that often acts up by varying speeds from normal, not working, staying on after car is shut off. It's called a blower control module and is above the blower motor on top fo the air channel the blower feeds into on the firewall. The Relay Center above needs two screws removed at the ends and it has enough slack in the wires to move up a couple inches and allow better access to two screws.
#2 for manual systems is the blower resistor pack has one of three resistor coils blown. OR, important, the contacts for the electrical wires are burned. Try wiggling the wires around the resistor pack with the blower turned on. See if it makes contact there. The blower resistor is same place the automatic control module is located.