Dryer drum belt, length 88.75" x width 1/4". If the drum does not turn, but you can hear the motor running then there is a good chance the belt has broken.
Dryer thermal limiter (or thermal fuse). May be located on the blower housing or element. If the dryer overheats, the thermal fuse blows to cut off power to the dryer. If the thermal fuse has blown, the dryer won't start. The thermal fuse cannot be reset--if the fuse has blown, it must be replaced
Washer drive belt. If this belt is broken, the washer will not spin or agitate.
Drive Motor for Dryer Drum and Blower With Pulley
Washer timer assembly. The timer controls all of the functions of the washer. If the timer is defective, the washer will not start. Pull out the plastic shaft behind the timer to release the timer knob.
Washer drive motor with pulley, 3/4 hp 1 speed
Dryer timer assembly
Switch, push to start