Integrated just look far better, we had one fitted in our new kitchen 7 years ago, it died last year, we googled, and found a video on how the door was fitted and removed it, replaced it with a new one dishwasher and reinstalled the door. But Dh and I are very good at DIY. Just the reverse of
The only thing to worry about at the moment is keeping the decor door.
First things first, ring Hotpoint number printed on the machine, ask them what that error code is. It might be an easy fix you can do yourself.
The plug socket for a dishwasher is usually in the cupboard next to the dishwasher for integrated ones. You wouldn't know mine was unless you knew where to look which is basically at the back at the bottom of the cupboard.
Is a new one problematic because you physically can't get one into your ktichen? Is it a mobilty issue? ie you can't shove it or carry it? Just trying to help out.
Re the old one, dead easy to remove, take off the plinth underneath and then unscrew every screw at the front of the dishwasher, on the door and sideways into the cabinet and top into the worktop. The video explains how it goes in. Then the decor door should just unhook, but worry about that later, the dishwasher should be able to be pulled out, remember the hose is connected under the sink!