I got it all apart tonight and it was indeed the heater control valve, which was the first thing I suspected. But I figure why not flush the heater core while in there, it takes literally like 5 minutes. Looking for one to get over nighted now since I have to drive my motorcycle to work in this freezing weather.
4 things i've noticed: - a little bit of mouse poo on into the engine bay. - a very light smell of coolant,only outside, also a little bit of steam from heater area in the front driver side, honestly I dunno is is due to the rain on the heater or if there's a real leak somewhere. - when heating is working on passenger side, if i turn the driver .