On Jan 31, 9:32*am, Nate Nagel wrote:
Marc wrote:
I have an April Air Model 224 humidifier. *Water continues to run even
with the furnace off. *I don't think the problem is with the
humidistat. *I can hear it clicking on and off. *The only way to stop
the water flow is to shut off the water flow with the saddle valve. *I
think it may be the solenoid valve which should be easy to replace.
Am I on the right track?

probably. *Meter the wires going to the solenoid. *If they are dead then
the solenoid is stuck. *If they have 24VAC on them then the relay board
is bad. *Really not much else to them. *(I'm ASSuming the 224 is similar
to the 760 with which I'm familiar.)

nate

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You could also try cleaning out the solenoid, but if it won't close
with no voltage on it, it's probably bad or even if you free it up,
it's likely to seize again. If it turns out the solenoid is bad, I
have a working used one from a 760. Not sure if it's the same, but
you can probably figure it out from AA website. If so and you're
interested in it, email me and we can work out something.