Product review (4 stars): a Nice universal option for bypass humidifiers
If you need to bring back a bypass humidifier from the dead, your likely culprit is the solenoid valve ( I mean, it is like the one moving part), but they tend to be pretty pricey. This is a nice universal option if you can't find the one for your humidifier. You'll have to use wire nuts or some other electric splice to hook it up to your furnace wire, but that should be fairly straightforward. So far so good on my end, I'll update to see how much life I get out of this one. It was a bit of a pain to get it installed, but that's solenoid for you.
I received this item at discount for review.