I didn't know what the problem could be. My Whirlpool washer is 20 years old and I have never had a problem with it. After doing a little bit of research, I determined that it would be the lid switch or the timer. I saw here that both are often bought together, so I purchased both. I had the parts shipped overnight. The same day I ordered the parts, I took the cover off of the washer, as instructed in the video. I wanted to be prepared so that when I got home from work the next day, I could install the lid switch first to see if that was the problem. Less than 10 minutes later, the part was installed, and I continued the wash cycle. Fixed it right up! I think it's fantastic that Appliance Parts Pros have a 365-day return policy on parts. This was my 2nd experience with APP. Satisfied customer and my fiancé thinks I'm incredibly handy!