2000 Bravada climate control

[scoutdad57]

I'm not getting full heat output. Even with control maxxed out I get a medium level of heat with occasional bursts of cold. Replaced the thermostat. Same thing.

Any ideas anyone?

Thanks

[Redog]

Could be a blown resistor somewhere around the blower motor

[scoutdad57]

Actually, I get plenty of air force out of the vents, its just that the temperature of the air is not as hot as it used to be. Would a blown resistor cause this??

[Oldsfan]

2000... could be a leaking intake manifold gasket. Not allowing the coolant to reach full temperature because the pressure is low due to the leak. 4.3s needing intake gaskets aren't unusual. Have it checked.

Paul

[ohiyesa320]

Starting this morning, I have been having the same problem. I have full air from the blower, but it is no longer hot. At best it is luke warm. I first saw the thread from the 98 recommending using the "cut here" access panel. I tried that, but it looks like my door is stuck into the cold position, or my 2000 doesn't have a door. Also, the air that comes out of that open access panel when the car is running is still only luke warm.

My hands are too big to fit into the tiny access hole. I then poped down the Glove compartment, and both actuators are working for direction of flow, and AC. I don't see an actuator for the heat/cool adjustments. I am currently in Wolcott, Colorado (at 9000 feet) and it is COLD and SNOWY here. Any help would be appreciated.

[Redog]

Originally Posted by scoutdad57

Actually, I get plenty of air force out of the vents, its just that the temperature of the air is not as hot as it used to be. Would a blown resistor cause this??

Maybe the coolant thing could be the Thromo stuck open, never allowing the car to reach an operating temp

[keith6989]

It could be one or more of the following:

Low coolant level
incorrect thermostat
restricted coolant flow through heater core
heater hoses plugged
mis'adjusted control cable
sticking heater controll valve
vacum hose leaking/blocked
vacum motors busted
blocked air inlet
inoperitive blower moter
oil res in heater core fins
dirt on heater core fins

I hope this helps.

[richard gabrisch]

I am haveing the same problem and none of the above worked. My heater will thorw out some heat then I hear a small noise from high under the dash and the temperture changs; if it was hot it turns to cool and if it was cold it turns to warm.
The same thing happens in the A/C mode: hot to cool -- or cool to hot.

Thanks for help
Rich

[keith6989]

Interesting... Has anyone had any luck fixing their's yet... I will ask a few more people amd see what I can come up with.

Welcome to the site Rich

[scoutdad57]

I have replaced the thermostat - - no dice didn't help, I'll keep trying. Damn cars didn't used to be so complicated to fix.

[keith6989]

You said it, they sure don't make them like they used to. I think I might call the GM dealer here and see if they can tell me anything. Good luck trying to fix yours.

[Oldsguy]

It's a computer thing! My wife's '99 LeSabre does something similar, no cold air out the upper vents, just the lowers and the defrost vents. I hate it and know it is air management but darn it all with all the sensors and damper doors and computers and whiz bangies. Sheesh!

[richard gabrisch]

My mechanic says he has found the problem with a motor. The motor is located way up under the dash on the right side. He can't find a replacement motor yet. Even if he can find it he says he doesn't know how to get to the F%#K*&g thing. He locked it into a prosition where it gives heat all the time and it doesn't make the noise. The setting don't work neither does the AC.
I will keep you all informed as to what happens.

Rich