I was thinkin you may could clean the contacts on that board and retry?
Okay, using the outdated manual, the schematic in the machine, and a little brain power to figure out which wires were at which terminal, I found that the thermist-thingy (the temperature reading resistor on the water valves) was not changing AT ALL. I in fact cleaned the terminals, noticing that the one painted blue was on the hot water side and the red was on the cold side. I doubt that mattered, but I cleaned the corrosion and IT WORKS again. Next time, I will cut the wires and solder new connectors, for that is where most the corrosion is.