What if you just put him in a wheelchair and take him out somewhere? Just as a start....to get him interested in life again...seeing other people....seeing nature, etc. Does he go to church?
As for the dishes...what if you didn't do them? Would he just let them pile up?
Remember, you can't "force" anyone to do anything. They have to want to do it....especially our parents. You will always be a "child" to him, and he may even boycott purposefully and not do what you ask...because he is the parent, not you.
Try turning it around. Tell him you need help...you can't do it alone, etc. Parents always want to "help" their kids.