Whirlpool Dryer IED4400SQ0 wont heat
Check your thermal fuse and the thermal cut-out fuse, two different fuses that can cause a dryer to run and not heat when open, or some dryers will not start when one of these has gotten too hot and opened....Usually caused by venting restriction of too much lint, common problem...........
A open operating thermostat or the high limit being open are also possible........;.
The other checks are live voltage checks, timer contacts, wiring, temp and internal motor switch......schematic is probably in back of control panel........
Takes some reading of a wiring diagram, understanding how to split the circuit ............Not for beginners.............Hope this helps...........do not forget to unplug dryer when doing anything on unit besides live voltage checks on circuits,,,,,,,,,,,,,,,