Question about Aprilaire 600 Humidifier

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Water flow to my model 600 seems to be too quick. It splashes all over inside my furnace duct and over fills the drain causing water to run all over the floor. Could this be a bad selonoid?

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  • cdcjfalteyse Dec 16, 2008

    Well, it has worked for the last 7 years just fne. I remember the water flowing out much slower then now. When it enters the resivoir it sprays everywhere.

  • cdcjfalteyse Dec 16, 2008

    Why would this all of a sudden be an issue?

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It is not likely to be caused by the selonoid valve. The selonoid is designed to be either open or closed, so if the unit is calling for humidity, it should be 100% open allowing as much water as possible to flow through. In cases of a bad selonoid, it will usually stick open or stick closed, but I have never heard of one allowing too much water through. Check to make sure your drain is clear and that the incoming line to the humidifier is positioned properly on the inside of the unit. If this doesn't solve the problem, it could be that the water line to the humidifier is too large, allowing more flow than the unit is designed for.

Posted on Dec 16, 2008

  • Bruce Chase Dec 16, 2008

    If the unit was installed with a saddle valve, which is most often the case, you could try turning down the water pressure by tightening the valve a bit. Just follow the copper water line from the humidifier back to the main water line and look for a little valve that you can turn. Try to tighten this enough so that you still have water flowing, but at the proper volume so that it doesn't overflow and splash all over.

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