Newbie Mistake

[daverob]

It'll probably work - but the varistor should be around 45V, not 110 - at least per the spec of the original part.

Just echoing this, as it's quite important. The machine will work (if nothing else has failed!) with a 110v part, but it won't have any overvoltage protection. If you need protection then replace it with something around 45v (40V minimum, and not too much higher if possible).