Several years ago, we had a rally in the Amish country of Illinois. They arranged to bring in a younger fellow from "Fix your fridge" (he has a web site). An owner was having difficulty with his (brand not remembered). They pulled it out of the coach and carried it in the hall. The Amish gut pulled out a power screwdriver and "field stripped" it in about a minute. He was describing what he was doing the whole time. (He clearly would have been faster without the commentary.) After a short talk about the failed unit, he unboxed the replacement he had brought with him and stuffed it back in. Some volunteers carried it out, reinstalled and came back before we were though asking questions.
Matt