1997 Pontiac Bonneville Q&A
1997 Pontiac Bonneville Question: Heater with a mind of its own!
My heater works. . .sometimes. When it doesn't, which is usually anytime the outside temp is below 42 degrees, it won't blow at all. It did this same thing last winter, but would come on if a hit a bump in the road, but now that doesn't even seem to make it come "on". Im not absolutely certain, but my AC isn't holding freeon and it may be leaking from the compressor itself. I toughed the summer out because I know if the AC compressor does need replaced, it would be quite costly. What might give with the heater intermittantly working? - MaryJinMS
This can be a problem with just about any part of the blower motor and/or control system. It will require a diagnosis of the electrical circuit that supplies voltage to the blower motor and the blower motor itself. If it isn't working, then that make the diagnosis much easier than than an intermittent problem. - Bret Bodas