The water is hot again

Hooray! Yippee! I write in the jubilation of another do-it-yourself project successfully completed. This little job would have been the work of about fifteen minutes if done by a sighted person. It involved the replacement of a small thermostat which regulated the temperature of the water in the hot water heater. All it needed was the disconnecting of two black wires, pulling out the old thermostat, which is about 2 inches in length, and slipping in the new one. But my husband is severely visually handicapped, and although he knows what to do, he has difficulty in doing it. So I help him. And since we are also both almost deaf, and seldom if ever wear our hearing aids, and become quite vocal when working with one another, the ensuing commotion can be quite alarming. A casual observer, or even a concerned friend or relative, would run in terror if they came upon us in the middle of the fracas, fearing that violence was about to break out. This little scenario is typical.
SCENE 1
Husband is seated on a stool in front of the heater, peering into its interior. Wife is on the other side of the house, by the fuse box.
Husband: Turn the power off.
Wife: What? I can't hear you.
Husband: raising voice: turn the @#!!* power off.
Wife: It's off
Husband: Are you sure?
Wife: What? I can't hear you.
Husband doesn't answer Wife comes back to where husband is still examining the thermostat with a magnifying glass.
Wife: The power is off.
Husband: Don't touch any of the wires.
Wife: Why not? the power is off.
Husband: I don't trust it, Just don't touch them.
Wife doesn't answer. Husband gingerly puts screw driver in screw head and tries to turn. Screw is in tight and he can't turn it. Choice words follow and husband uses as much force as he can muster and finally screw comes loose and black wire is released. There are two black wires. Second wire comes off easily. Thermostat slides off bracket and new thermostat is taken out of box. Husband tries to slide it onto bracket but it won't fit.
Wife: Why didn't you look at how it goes on when you took the old one off?
Husband: (losing it): Here. You try. I hope you electrocute yourself. You always know everything.
Wife tries without success to fit thermostat onto bracket. They sit looking at one another. Husband loses patience and forces thermostat onto bracket and puts wires in place and screws them in.
Husband: There! Was that so hard?
Wife has no appropriate answer. She turns on power. Both elements begin heating water. Problem solved.
Usually when we work on some project, someone will come along and interrupt us during some crucial point in the operation. Today we were lucky. In actuality, we finished the whole job in a little less than hour. One really doesn't appreciate hot water until it is unavailable.