Aprilaire 600 new solenoid still not working

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Old 02-15-15, 08:43 AM
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Aprilaire 600 new solenoid still not working

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24 v comes from the furnace board to the humidifier controller. I read 27v.

I separated the wires at the solenoid and read 26.9.

I replaced the solenoid as it was not opening figuring that was the issue yet I am still not getting water flow.

I assumed I could take the power supply right from the furnace and connect it to the valve, so I did and instant water flow. But I can't leave it that way

Can the issue be in the humidifier control board?

Any help?
 
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Old 02-15-15, 10:09 PM
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Welcome to the forums.

You need to check for 24vac on the solenoid with the wires connected. If you have 24vac to the controller but not to the solenoid.... the humidistat is defective.
 
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