I bought this washer off of Craigslist. When I first ran it, it ran but didn't drain. I did some research and checked the pump, which had a broken impeller and was full of water. I replaced it, tried to turn it on and it wouldn't start at all.

When you press start it beeps 3 times and nothing happens. After some more research and some bumbling with a multi-meter I bought a new pressure switch, and replaced it and I also cleared the hose going to it.

This didn't help. Still, it gives 3 beeps and doesn't start. From what I've read, it's probably the CCU, but it could also be the motor controller or the door switch, but I'm not sure how to test it. I was able to get it into diagnostic mode and get the codes. I'm adding a link to a video of the codes it gives. The first one is long drain, or F21.

There's a ton of information on the net about how to fix the problem with the pump, but nothing about this problem.

https://youtu.be/SdgA0XDkjBg