Re the problem, if you have a little door not opening it is a problem knowing if it is the little door or the thing telling it to open that is the fault. If you have tried the door then it is likely to be the thing telling it to open. So can you trace back to see how it is being told to open. May just be a faulty wire or where it goes into the door.
I had a bosch dishwasher. It did not work so I kept taking bits off and testing them until the whole thing was in bits. I gave up with it,bought a second hand replacement on
ebay, and chucked the broken one out in the garden where it stood for a week in the rain before I took it down the dump.
New one did not work and only then I found I had a faulty plug socket!
Amazingly all the bits in the garden went back together and it is still working today 3 years later. Made £10 profit selling the replacement.