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When the blower works only on the high setting its usually a bad blower resistor which is right near the blower motor. now you say it would always blow high regardless of the fan speed setting that would indicate probably the climate control unit or a connector problem somewhere. finally it not working at all may be the climate control unit or connection went bad even further. it might have a blown fuse or a bad blower motor in addition to the climate control unit or connector problem .check for power and ground at the blower motor. the power is supplied from fuses and may have a relay also. the ground is supplied from the climate control unit and goes through the resistor to control the fan speed. good luck
what has happened is you lost voltage to the control panel theres a hard way! and a easy way to fix that! the easy way is too remove the glove box and the plastic around the heater control panel and take the 4 screws out of the panel switch mount bracket tilt the panel foward and find the main hot wire that goes to it then take a wire from the cig lighter socket hot wire and jumper it too the AC switch temp control walla!!
Had the same problem, replaced the ambient air temp sensor in front of the radiator. Cost is like 10-15 bucks. Don't worry if temp doesn't change right away. Took me about 5 miles and then it worked great.
I had a similar problem. My control worked to increase heat, but the cool button would not allow the temp to go back down. I took the climate control apart. I don't think GM intended this to be done, because it is held by little plastic **** that will break off. This is very deilicate. Take a rasor knife and trim the heads of the ****. This will allow most of them to pull through w/o braking off. Be very careful now to separrate the parts. There are little rubber switches that will have to go back exactly. I had to use some small pieces of thin tape to hold some of them as i re-assembled it. The problem was crud on the circuit where the cooling button makes contact. I took 0000 steel wool on a pencil eraser and cleaned the circuit where the switch makes contact. I also cleaned the little black switch inside the gray rubber. I re-assembled and tested. Be suse to do this, because you don't want to take every thing apart again. I had to tape the control back together. You could gule, but it would be hard if you had to get back into it. Mine now works find and saved a couple of 100 dollars. hope this helps... Stephen
you may have an air mix motor problem or a mode control motor problem. there is a test you can do that may help: 1. turn the ignition switch on. 2. turn the fan switch off. 3. press the recirc control button to select recirc (recirc indicator light comes on.) 4. press and hold the recirc button to select fresh (recirc indicator goes off). Continue to hold the the button down until the recirc indicator comes on for two seconds and then goes off. If the system is okay, the recirc indicator will stay off. If there is a problem, the recirc indicator blinks a code to indicate a fault. 1 blink=air mix control motor/circuit fault. 2 blinks= mode control motor/circuit fault. 3 blinks= evaporator temp sensor circuit fault. In case of multiple problems, the recirc indicator will only blink the code with the least number. write back if this test shows a code and we'll go from there.
Yeah it has dual climate control, and your solution(FTjoe) that's probably the problem,Not checking the temp settings on both sides..makes me wonder how to mis it 'cause the tempsetting display is digital under/next to the < > buttons, hihihi.