Thanks guys for the input. I figured out for sure its NOT the K7 relay. I tinkered a bit with the car from the vents that are outside, below the windshield. I could see the fan from the passenger side vent (once I removed the vent cover), and sprayed it with some WD40. I moved the fan blades, and once I started up the car, the heat was working - but making that LOUD, terrible sound again. Soby 325ibimmergirl - Technical Forum
A couple of weeks ago, I noticed that my heater would make a LOUD buzzing sound if I had it on level 2, 3 or 4 (whether it was on the vent, my face or feet). Now after running it like crazy, the heat won't work at all! This is treacherous seeing how winter is closing in on us, and now I have to scrape my car in the morning. I checked Fuse 20, and its a 30amp fuse that still looks good.by 325ibimmergirl - Technical Forum