We already have this with the dryer function... It's too hot to allow you to open the door and accept the risk yourself, so I need you to wait 10 minutes for the machine too cool before I unlock the door.
I have that with my washer. There's a catch on the door that won't open until it's CERTAIN spinning has stopped. Granted, that's a safety issue of sorts.
Of course it was the first part to fail. Of course you have to enter from behind to override it.
Of course it was the first part to fail. Of course you have to enter from behind to override it.