@dtelder Pretty sure it'd be "fix"able. All it does is listen for a few button presses, control a motor, switch a pump on and off, and open and close a pair of solenoid valves. And maybe blink a few lights. Yank the epoxies p on out and replace it with an Arduino and maybe a few SSRs. That's what I plan on doing with mine if I ever need to, it's super solidly build and the spares like the solenoid and the pump are still readily available.
(I've _almost_ done it anyway, to get rid of the stupid tune it plays when it's finished. Though if I cared enough I'd just snip the beeper wires.)
@bigiain @dtelder @SwiftOnSecurity If you want to save a bunch of time, there are generic washing machine control boards available on aliexpress.