Okay, so last night everything was working a-okay. I get in my car this morning, bright and early, and drive rush-hour traffic, 20 minutes, and notice that my temperature gauge won't move off of "C!" I even stopped for gas, restarted my car, and noticed that it moved a bit off of the lowest position, but just a hair directly onto "C." I know for sure the engine isn't cold... 20 minutes of driving. Blah. What could be up?