I work for a company which performs repairs on exercise equipment. One of my biggest problems is a constant failure of a Thermistor resistor on a certain brand treadmills motor control board. I am guessing poor design, but I am hoping somebody can clear up exactly what a thermistor resistor is for. I wiki'ed it, and I realize that it is a resistor which changes it's values according to temperature, but I don't understand why that would need to be applied. These little junk Thermistors are a headache, and I would love to figure out a work-around. They are constantly frying, and they are placed right next to a fuse on this board. Any thoughts would be appreciated. I am not an electrical engineer, engineer, or even an eng; so laymen terms will be very much appreciated.