OK, today i was driving my jeep and decided it was a little chilly, so i turned the heater on, and nothing happened at all when i flipped the switch. Now i mean nothing is working associated with A/C or heat, it doesnt matter if the switch is set to hot or cold, vent or any of the others, or what level its set to. It worked just a day or two ago, and it just does nothing at all now. I was also replacing fuses to fix my radio last night as well if that helps. PLEASE HELP BEFORE IT GETS COLD AGAIN!!!!