lady kenmore ultra fabric care

im unsure of the age my dryer is i got it used just recently. i run it on med. heat. but it onlyruns for so long im guessing when it gets so hot it quits working and i got to let it sit for at least a half hour or longer b4 it will work again. plus the drum has stoped movin. i like kenmore products have always had the name for my dryers as they are easy to repair.ive done so with past dryers. i havent opened up the dryer yet but im guessing the belt is broke as to y the drum wont turn but the over heating and not working until well cooled off i havent dealt with b4 could u please explain as to y this might b happening and how it could possibly be fixed. thank you, Tara