First, let me share with you that I have never done anything with a dryer besides put my clothes in it and press start. I'm a girl that will try to fix things on my own if I can learn how to do it. I can do it anyone can do it.
I found out by asking questions, that I needed to purchase a multimeter and learn how to use it. There are some great videos online that can demonstrate how to read a multimeter. Then I viewed two videos online on how to repair the exact model of my Whirlpool dryer for a heating problem. It specifically showed me how to take apart the back of my Whirlpool dryer and test each probable problem area. I needed a Phillips screwdriver, and a rachet set to open and remove the parts. First of all, it's very important to unplug your dryer from the wall outlet. Remember, safety first. I found that the lent area was packed with "years" of lent. I cleaned that out thoroughly by removing each part. Then, I used the multimeter to locate the problem by checking the three thermostats in back of the dryer by checking the ohms. I immediately found out that the safety shut off thermostat was no longer working properly. I also removed the heating element and visually checked it to see if any of the coils were damaged. It was apparent once I removed it that my heating element was no longer working as well. I did a lot of research online to comparison shop, & I found that appliance parts pros had the products I needed in stock and at a very reasonable price. I thought that I would not pay the extra fee for the quick shipping, since it said that I could receive it in maybe 2 days. To my amazement, I received it in less than 24 hours. I put the parts back into my dryer exactly as I had taken them out, and because I had labeled the wires for their connection, it was very easy to reinstall. Thank you appliance parts pros for helping me repair my dryer and save me a lot of money and time. I'm feeling a little bit like Wonder Woman right now. :-) Good luck to all of you who may have a similar problem as myself. Don't be afraid to ask questions, it helps us learn.