I am having a problem with my temperature gauge. I noticed it the other day. When I start my car, it appears to be fine. As I start to go, as soon as it hits the blue color on the gauge it goes all the way past red. I am pretty certain that my car is not running hot. Sometimes the gauge will not work at all and sometimes it works just fine. I am not sure what is wrong with it but I would like to have my dad fix it for me if I can get away with it. Where do I find the sensor so that I can replace it? Or, is it a much deeper problem than just a sensor or fuse?