Question about Honeywell HE220A1019 Whole House Humidifier Humidifier

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Water flows through humidifier all the time even when power is turned off

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I was just reading up on this and comments from others say that there is a solenoid that is stuck open because of mineral (lime or calcium) build-up

Posted on Oct 19, 2013

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Honeywell HE440A steam power humidifier

Honeywell has had lots of problems with this humidifier. They are coming out with a completely redesigned steam humidifier that will be available in a month or two. If you know who installed it (through equipment stickers and such) you can probably get them to swap your old trouble prone unit for the new design for just the labor. If they won't, then push them to talk with their Honeywell distributor about it.

The problem is most likely a stuck float in the humidifier. There are two floats that run up and down. One that tells it when to add water, and one that is a safety. They both tend to get stuck with mineral deposits.

You can fix it by unplugging the humidifier, turning off the water, draining the pan (unscrew the drain on the bottom a few turns), disconnecting the water lines and wires (2 molded plugs and 2 screw terminals-don't worry about if they get swapped). There should be a couple of screws that lock it into the ductwork such that when you remove the screws you can pull the whole unit out to see inside the water tank. Then just clean everything out well and put it back together in the same order.

You really do want Honeywell to get you a new humidifier though.

Posted on Nov 17, 2007

  • 1 Answer

SOURCE: No water running through the pad

I has same problem and was able to fix ti by taking off the selonoid (cylinder) and then removing both fittings (where the water line enters and then exits the selonoid. The fitting where the water enters has a small pinhole that I found clogged and just cleaned it with a toothpick. After cleaning and reattaching everything, it works fine.

If that doesn't work, you might need a new selonoid which are around $70-$80.

Posted on Dec 08, 2007

  • 1 Answer

SOURCE: Water flow through humidifier

The solenoid that turns on the water to the unit should not change the water flow, so you should get the same amount of water that flows into the solenoid. If you want less water, you can partially close the valve at the water source.

Posted on Jan 22, 2008

  • 189 Answers

SOURCE: No Water flow thru Humidifier

Loosen the brass fitting where it connects to the soleniod valve. If water comes out your saddle valve is ok. Carefully retighten this fitting. With the humidifier turned on loosen the first fitting down stream from the valve see if water comes out. if it does turn the humidifier off and see if it stops, it should. That will tell you the the valve is ok then, just clean the filter and the oriface. if it does not turn on and off check the wiring. if ok replace the valve.
Good luck

Posted on Mar 29, 2009

  • 21 Answers

SOURCE: Water flow from humidifier never stops. Even when furnace is off.

No, it will not stop flowwing if it is the water supply. A solenoid valve opens the flow everytime there is a call for humidity, but it stops at the humidifier when there is no call, so it will leak from that point until it is fixed or tightened.

Posted on Aug 20, 2009

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the float may be bad or sticking allowing water to run continusly even when unit is off.

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1 Answer

No water flow through solenoid


The water flow through the humidifier is limited/controlled by an orifice. This small opening can easily clog. After disassembly use a small wire to clear the debris trapped in the small hole,

Hope this helps?
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1 Answer

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the humidistat on this unit just acts as a set of dry contacts. with the humidifier plugged in, you should be able to touch the 2 brown wires by the water solenoid together and get the power fan to run and the water solenoid to enrgize. if you do this and water does not flow, you most likely have a bad water soenoid. it is either electrically bad, or just plugged with water deposits. sometimes you can pull it apart and clean it, sometimes you just have to replace the solenoid.

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1 Answer

No Water flow thru Humidifier


Loosen the brass fitting where it connects to the soleniod valve. If water comes out your saddle valve is ok. Carefully retighten this fitting. With the humidifier turned on loosen the first fitting down stream from the valve see if water comes out. if it does turn the humidifier off and see if it stops, it should. That will tell you the the valve is ok then, just clean the filter and the oriface. if it does not turn on and off check the wiring. if ok replace the valve.
Good luck

Nov 22, 2008 | Honeywell HE365 Humidifier

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I have the HE265B By-Pass Flow-Through Hunidifiers installed in the summer, but it never on, until this fall, I tried to turn, but no water flow through. How can I test it? The contractor is NOT...


first break or loosen the water line connection at the humidifier and if you get water then you know it is something else. While the heat is running and main blower is also running, turn the humidistat from low to high; if you hear a click in the solenoid valve (where you checked the water) then you know it has power and the humidistat works. anything deyond that call a good contractor.

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