When my dryer didn't work, I replaced the thermal fuse. The fuse is part #3392519. I found it on AppliancePartsPros.com for $9. Got it in two days. I also replaced the thermal cut-off. They are both in the vent tube going out to your vent. You have to pop the two screws off the bottom panel below the dryer door to get to it. On the dryer vent chute, you will see four wires. The two blue ones go to the thermal fuse. The red and black go to the thermal cut-off. Also remember to clean the lint tube venting to the outside of the house.
Note to "Rich" - You do not need to heat up to test. If the thermal fuse is open, it's bad. Same for thermal cut-off.