In chasing down a plumbing problem elsewhere, I stripped the threads on the washer's inlet valve when swapping the hot and cold hoses.

Just kept removing rear panel fasteners until the panel could be separated from the washer sides and top. Removed the existing valve from the rear panel by removing one screw, and lifting the valve assembly slightly so that it could be pushed back through the rear panel holes. Removed the existing valve's wiring and outlet hose and transferred them to the new valve. When the four wires and one hose had been transferred from old to new, valve, inserted the new valve with connected wiring and hose back into the rear panel holes, and aligned the valve's screw hole with the hole in the rear panel. Replaced the screw which secures the valve assembly to the rear panel, and re-attached the rear panel.