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Originally Posted by gobobcats
There is no air period. It's completely dead. The buttons light up, but we get no flow at all. So it wouldn't be the fuse? Should I just take it in to Buick?
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There is a fuse in the rear fuse box--under the rear seat. I'm looking at 2003 LeSabre manual and assuming it's similar in design to the Park Avenue system. It's a 30 amp fuse and supplies power to the blower control module which controls the blower speeds. That fuse is labeled HVAC BLO. There's another fuse HVAC, and one IGN 3 which supplies the control module for the HVAC motors. Do you hear the vanes inside the car move when you press different buttons just sitting with the ignition key ON but the car not running?
If it's not the fuse, a good shop should be able to troubleshoot it or a Buick dealer will charge more but often be less trouble in the end. The only thing I've found is they often won't fix something; instead they just replace parts because that's where the money is the for parts department.