I replaced the dryer heating element. The Appliance Parts Pros' Youtube tutorials on testing dryer components and replacing the dryer heating element made the project very accessible. The entire project took a little over an hour - dismantling (and reassembling) the dryer to gain access to the dryer heating element took up almost all that time. Once I had access to the dryer heating element, I replaced it in a matter of minutes. And I had no screws left over!