Anybody have an idea why heater is blowing in front vents only and not anywhere else? Any other button (defrost windshield button) not working, I tried seeing if theres a plug missing or loose in the back of controller but its plugged in. Even checkd fuses. How many fuses are swappable that I should be aware of? Is there only one fuse under the dash that Im aware of for this problem? Any information is appreciated, its freezing cold and a pain with out heat to blow to defrost.