While I was messing around trying to advance it by hand to pinpoint the problem, I smelled a weird burning electric smell, after which I could not get the machine to pump out water, even by advancing the dial manually. My repair guy identified a burned-out solenoid -- that was the smell. But I'm pretty sure the timer was bad too, since the problem started before the solenoid burned. So I replaced the timer and the solenoid. It's working now, but repair guy thinks the whole thing started with a slight leak causing a short...we'll see. So far, the parts have cost a lot less than a new machine, even though I had to buy an extra solenoid assembly because the exact match for my model did not include the piston.