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Pontiac Bonneville Heating/Cooling Problems

150 messages, Last post on Dec 07, 2009 at 3:10 PM
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Replying to: imidazol97 (Oct 02, 2009 8:53 am) ..............also I pulled the unit out and checked the connector in the back where it slides in for power using a grounded probe light and I had pwr on about 4 of the leads on that connector. That unit is hvac unit is really flimsy.. I think I'll try and find one at the salvage yard and replace it .. maybe that's the problem. will let you know ... thanks
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Replying to: cmazeo (Oct 02, 2009 11:24 am) You said your car was the automatic temperature control... because you said you couldn't see the readout. I didn't check the manual unit. Odd the passenger door module wouldn't have power. Do the windows and power locks work on that door? |
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Replying to: imidazol97 (Oct 02, 2009 12:49 pm) |
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Replying to: imidazol97 (Oct 02, 2009 12:49 pm)
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Replying to: cmazeo (Oct 04, 2009 1:08 pm) 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. link title here's one for $9.99 and 9.99 shipping bid current. link title 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.
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Replying to: imidazol97 (Oct 04, 2009 6:44 pm) |
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Replying to: imidazol97 (Sep 21, 2009 1:23 pm) 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. Rockoh |
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| 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? | |
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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.
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Replying to: popsydoodle (Dec 06, 2009 8:16 pm) 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? |
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