Callled the service company to diagnose the problem. Watched him take machine apart. He found the problem. Told me the parts that I needed. Didnt know what they were. Went to partselect.com looked my model up and found parts and ordered. Followed same steps as repair guy: Two screws in back of machine then slide top off. Six screws in front to remove front door ( 4 screws on top 2 on bottom) Changed the thermostat and thermistor. Saved 320 dollars :)
top and the front had to be removed to get to the fan... the thermistor that sits in the exaust fan went bad... the heat would come on for a few minutes then turn off completely not getting to clothes dry.....
Had to pull the top off and the front of dryer with a few phillips screws and was able to get to the thermistor and I also replaced the heating coil because it was bad.The cause of the problem was because of a clogged up vent. It was a easy replacement.