kbarr
The first thing I would do is to check the heat element. Pull the dryer out of the wall, remove the power, remove the rear cover. On the right side you'll see the heater box. Remove wires from the heater and check it for continuity. If there is no continuity then the heater has to be replaced. The part number for the new heater is
AP3109438
If the heater is fine check the thermal fuse and the thermal cut off. Part number for the thermal fuse is
AP3132867 and the part number for the thermal cut off is
AP3094224
Good luck.
Gene.