Product review (4 stars): Home Techy
First, I don't like to pay repairman for jobs I can do. There are lots of places/forums which you can ask the experts for the parts and help.  Just take proper precautions while working with electrical items.  That being said, replacing thermostats, limit switches and coils are very easy to replace for the relative handy person.  These parts can easily be tested using a the cheapest basic multi-meter for continuity.  My coil and thermostat went on my Maytag Neptune front loader.  The packaging and shipping great as usual.  I tested the thermostat for continuity prior to installing.  While i was in there i ordered the other thermostat, limit switch and heating element(coil) and replaced them all (less than$100 for all of them) The dryer now has all new parts and works like a charm (changing the heating element certainly makes drying times faster!)