We've never plugged in the center machine -- we're (possibly wrongly) assuming that it's busted.
As I write, it's occurs to me that that assumption is rather silly. With laundry lines available in the basement and the back yard, plus the dryer, if that middle machine actually works, I could probably have all of the weekly loads finished in half the usual time.
Hmmmm... Bet you can guess what I'm doing tomorrow..... ;) Wish me luck!