So, I've recently noticed when either come to a stop or reaching my destination, a sound coming from the passenger footwell area. Sounds like a small DC motor operating within the heater core (think that's whats down there). It sounds like it's going nuts. Can't describe it on paper really, but almost as if it doesn't know what position it should be in is "hunting" (for lack of a better word). Anyone out there know what I'm talking about? Everything works fine, but I just feel like one day soemthings gonna shutdown from burning out. I have an 08 with about 15k mi.