Whirlpool dryer won't start

My dryer suddenly stopped working yesterday. I dried one load with no problem, then when I put the second load in and hit the start button, nothing happened. I noticed that the drum light is staying on, even after closing the door. Could the door switch be bad, or is there something else I should check?

thanks,
Megan

Here are your parts
Replacement parts for WHIRLPOOL WED5800SW0 29"electric Dryer | AppliancePartsPros.com

Here is a wiring diagram
http://www.servicematters.com/docs/wiring/Wiring%20Sheet%20-%203406661.pdf

Sounds to me like you have found the problem.