Here are some things to remember when you do this. 1) The breaker for the dryer is generally located outside on the side of the house somewhere near the electric meter. Most 220vac breakers are, which include any electric range, cooktop, wall oven, etc. 2) When your checking the breaker, actually physically touch it. Sometimes breakers can trip a but the spring that actually pulls the breaker to off position is weak and by visual inspection would appear on. Just simply reach in and tap the bar lightly in the off direction. If it pops over to the off position, turn it back on then go check your dryer. If the breaker passes inspection, I would unplug the machine because there migfht be a short at the terminal block where the plug connects to the dryer. After you've unplugged it, remove the back and check to see if everything is ok.
Next, remove the back panel to access this part. Be sure that you unplug the machine before starting. Once the back panel has been taken off and placed aside the thermal switch will be located on the left lower side near the blower housing . It will be thin and long and located near the cycling thermostat that has for prongs on it. On certain machines, the thermal fuse is located in the front. To access this you must remove the kickplate, which can be done by pushing the clips, one on each side jsut above the top of the kickplate, in between the top and abottom portion. The part numbers are the same for either style dryer. To test this part you can either take the wires off it and tie them together then plug the machine back in and see if it starts, or you can use a multimeter and check to see if there is continuity, if there is its good, if not, bad. The thermal fuse will usually be white, and if located in the back, be thin and long with two wires on it, left and right. If in the bottom front, it will be front center on the exhaust duct. Another possible problem is that the door switch isn't functioning properly. You can visually check this by open the door and pressing the switch and listen for a click sound upon pressing and releasing .
In some rare cases the timer itself will prevent the dryer from starting. If you have tested both the thermal fuse and the door switch, and verified that the terminal block where the cord connects are ok then this will be the problem
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