Open your dryer door. Look on the front where the door closes against and give us a good model number.

Sorry I missed typrd themodel number FERB7800DS0. I found the thermal limiter and was able to test it. It appears to be working. My next question when testing the timer motor should you receive a reading when touching the main terminals with the aux terminals? Or just when connecting the two main terminals?

For checking the timer motor you should have 120V at the contacts where the timer motor wires are attached, when on. What is the problem with the dryer and maybe we can be of greater assistance.