Question about Aprilaire 600 Humidifier

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Aprilaire 600 not getting a Solenoid click and no water flow at all

When I put it into test mode recently i thought I heard something snap. Ever since that snap I cannot get the solenoid to click and there seems to be no water supply at all. Any suggestions? I thought maybe I needed to take the cover off the humidstat and see if something needed to be reconnected. Not sure though.

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  • kennyr56 Oct 20, 2008

    I was not getting the solenoid click as well. With a minor tap with a screwdriver it now stays on all of the time regardless of the setting or knob position. I took the solenoid apart to look for an obvious problem but it appears that it is not a serviceable component. I am leaning toward a new solenoid but @ $60.00 I wanted a second opionion.

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Your solenoid may have seized. The best way to check is remove the cover off the humidifier pad housing, remove the rubber tube of the distribution tray and see if water comes out while in the test mode. If you have a volt meter you can test to see if you have 24volts at the two wires connected to the solenoid. If you have 24volts there but no water ,the solenoid is bad if not you may have a bad humidistat or humidifier transformer depending on how it is wired.

Posted on Mar 04, 2008

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