Aprilaire 600 solenoid valve won't shut off automatically

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Old 12-13-08, 08:27 AM
J
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Aprilaire 600 solenoid valve won't shut off automatically

I have an older Aprilaire 600 humidifier that was professionally installed about 15 years ago on my furnace. It has been working without concern for all that time. This year I noticed that the water solenoid was not shutting off atoumatically when the the heat is not blowing. I can shut it off by turning the humidstat to off, and it will shut off by itself on the test setting, so the I don't think the problem is with the solenoid. But any other setting and the solenoid activates and stays on. I am not much of an electrician, but was hoping someone could steer me in the right direction. Any advice is appreciated
 
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Old 12-13-08, 01:58 PM
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Sounds like the humidistat is defective, and may need to be replaced.
 
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