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Aprilaire 440 won't stop running

I noticed that we have no hot water and there is a contant flow of water exiting from a PVC pipe coming from the humidifier into the sump pit. I tried adjusting the setting on the humidistat and even turned it to off and the water just keeps flowing. It did stop when I turned the saddle valve all the way off for a little while, but then I won't get any humidity and it is very dry. It is Feb. in Chicago and it's been around 20 degrees and going to be hitting 30. I had the humidity set at 25, and just changed it to 35. I do not want to shut it off, but I do not want the water, hot water heater and sump pump running constantly and I do not want to always be out of hot water.

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  • sauters88 Mar 29, 2009

    I have an Aprilaire whole house humidifier and even though I turned the humidifier totally off, the water from the humidifier just runs and runs. We shut off the water valve completely to solve the problem temporarily.

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Disconnect the two low voltage wirings going into the solenoid valve. If the water does not stop running after a few minutes the valve is bad. When you check your local area to price a new valve. Also get a price for a new humidifier. You will be surprised to find that a whole new unit isn't that much more. Or should I say that you will find that the replacement parts are overpriced.
Good Luck
HVAC Teacher

Posted on Mar 08, 2009

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