TrueEase HE250 Circuit Board malfunction?

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Old 02-14-17, 09:06 PM
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TrueEase HE250 Circuit Board malfunction?

I have a TrueEase HE250 humidifier installed. The solenoid won't close unless I turn the power off to the humidifier at the switch to the transformer. I tried to turn the humidifier off at the controller and the water kept on running through the system meaning the solenoid was still engergized. I checked the voltage at the Power In (24VAC) and I get 24VAC. When I test the voltage at the terminals that lead to the solenoid, I get 48VAC.

How is that possible? What could be causing that to happen? Do I need to replace the board?

Thanks in advance for any/all advice.
 
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Old 02-14-17, 09:44 PM
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Welcome to the forums.

I haven't used Honeywell humidifiers in ages. Way too complicated and troublesome.
I've switched over to Aprilaire.

With the HE-250..... the solenoid valve is supposed to be 24 VDC.
Re-measure for DC voltages.

Pictures or a description of your connected wiring would also be helpful.
http://www.doityourself.com/forum/el...-pictures.html
 
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Old 02-18-17, 12:41 PM
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My bad. The Voltage at the power in is 27 VAC. The voltage going to the solenoid is 36 VDC. The strange thing is that there is always 36 VDC going to the solenoid, no matter whether the humidifier controller is turned on or not.

Thoughts?

Here is a picture of the wiring. Thanks again for any suggestions or help.

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Old 02-22-17, 06:29 PM
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Any one have any ideas? I have now changed out the circuit board and I still have the same problem. Could the transformer be the issue since it is outputting 27VAC, while the Humidifier is asking for only 24VAC?
 
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