Question about 2002 Buick Rendezvous

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A/c was running fine yesterday get in today and its not blowing cold or hot air could this be a fuse when you turn the knob it does nothing.

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Hi, there are several fuses involved, but I wouldn't count on that being the problem. Your system is solid state and a bit difficult to diagnose. I can give you some troubleshooting tips to try if you have a voltmeter. I have pasted your diagram below. Sorry the resolution is poor. It shows a 25 amp front blower fuse in the center console fuse panel, but that circuit terminates without function. There is a 40 amp IGN fuse under the hood; but if that fuse was bad, there would be other symptoms. There are a couple more fuses in the center console box labeled IGN/HVAC and MDL, but I think these run the air flow mode and other HVAC functions. Your blower is controlled by a processor. If i were there, I would check the input and output voltages of both the blower switch and then that controller, which is probably right behind the panel or along the route to the motor. The blower itself is above the passenger's feet. You have to remove the insulator panel to see it. Please let me know if you would like some troubleshooting instructions, and thanks for using FixYa.

a/c was running fine yesterday - jturcotte_1773.gif

Posted on May 28, 2011

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