Question about Honeywell 360B Humidifier

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No water is flowing to the humidifier so I obviously have a problem with where the valve connects to the water supply. With no water, the fan nothing works on the humidifier. Is this normal? If I get the water supply going again will cause the humidifier to start, or is it possible I also have a bad solenoid or something else? thanks.

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Is the saddle valve open? if it is check for sediment build up in it, if it;s clear you will need a new saddle valve. If the fan is not running than most likely you are not getting power to the humidifier, check for 24 volts to the solenoid valve. By the way do you have a current sensing relay or sail switch hooked up to this humidifier?

Posted on Dec 28, 2010

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1 Answer

Problem with 2 ....1 on each furnance Aprilaire 700 Humidifiers.. no fan no soilinoid click red light on one when furnance is runing they both worked last year


Odd for both to be out. Check the water supply sometimes corrosion or scale will block the saddle piercing valve. Run it all the way into the pipe. Usually need to spin the little valve handle clockwise. Then back it all the way back to full open and reset humidifier power and furnace power. After that may want to crack open water supply connection right before the solenoid at each humidifier to make sure water is getting to them.

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Hi we have a honeywell humidifier connected to our furnace we now here a buzzing sound what can this be from?


Hello. the buzzing sound you are hearing is coming from the solenoid valve on your humidifier. This could be due to low water flow going into the solenoid or the valve itself is going bad. I would check the saddle valve first and make sure you are getting a good stream of water to the solenoid valve, sometimes sediment gets built up in the saddle valve preventing water to flow. If the water flow looks good then replace solenoid valve.

Feb 03, 2011 | Honeywell HE365 Humidifier

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No water is making it into the humidifier. Loosened the nut of the water supply and there is water going to the unit


Hello, there could be sediment built up at the saddle valve outlet which is preventing water from flowing to the humidifier, If that is clear than the saddle valve must be replaced.

Jan 25, 2011 | General Filters 1042-LH Humidifier

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I would suggest that you locate supply valve to humidifier and loosen compression nut on outlet side to see if you have water at that point. If you do shut valve off and disconnect supply line on incoming water line and make sure it is clean. Check for plugged screens or lime build up. Clean as needed. If you aren't getting any flow thru shut off valve then turn off water supply to the valve and replace it. I hope this helps you. Thanks

Nov 26, 2010 | Honeywell HE365 Humidifier

1 Answer

When does the humidifier fan start? Does the water flow trigger it? Will the fan nt start if I turn off the water supply?


Humidifier should be powered from the furnace heating 24 volt terminals through a humidistat and then to your humidifier. The fan and the water solenoid on the unit should come on together. if the water is not turned on the fan should still run, unless the unit is not plugged in.

Nov 13, 2010 | Aprilaire 700 Humidifier

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Water keeps flowing through my humidifier even when the furnace is not on. Consequently my water bill is quite high. How do I take care of this problem of the water continuously flowing through the unit?


There should be a solinoid valve that starts and stops the flow of the water, based upon a call for heat, and to ensure the fan is running during operation. There must be some failure with this valve, or a short in the connection causing it to run constantly. Hope this helps

Mar 19, 2010 | Humidifiers

1 Answer

Water is getting to my solenoid valve and the valve is activated as it is warm to the touch. No water on the back side of the valve to the humidifier. It is on sometimes and other times is doesn't work....


Valves do go bad, but I had the same issue and it was the inlet orifice that was plugged.
To fix: Turn off the water supply. Disconnect the water inlet line to the solenoid. The water inlet line connect to ~ 1" long piece that goes into the solenoid. Unscrew the water inlet piece and remove it from the solenoid. Check it for water flow - water should slowly drip out the small orifice at the soleniod side. There is a pin-hole sized orifice on the solenoid side and it doesn't take much to plug it. There is also a narrow cone-shaped filter inside the inlet piece. You can use tweezers to remove the filter and & use a safety pin or sewing needle to clear the orifice. Check the filter, clean it if necessary, and reinstall the filter. Now check for water flow thru the part before reinstalling. Reconnect the water inlet line and turn on the water supply. Turn your humidistat to trigger the humidifier. You should see water flowing through the drain tube.

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We just bought a home with this humidifier installed on the furnace. There's no activity when the furnace is running. The water is connected but does not flow. Could this be a transformer problem? We guess...


Could be a couple of things. Transformer can be bad. Try connecting the two wires (usually wired red and white) from the transformer to terminal W and C on the circut board. Your bypassing the transformer and if installed a current sensing relay. The furnace transformer will/should handle the extra load. Turn on the furnace, if still not working, loosen the water supply line at the water solenoid on the humidifier, if water flows out then your supply valve isn't clogged, if no water then try screwing in the needle on the supply valve all the way in then back out. If still no water then the valve is clogged. If all is good then it looks like the water solenoid is bad or wiring to valve/humidifier control. Don't find the controls bad that often. Have fun!

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No. when you remove the front cover it will automatically disconnect the power supply. Try changing the water panel and cleaning out the orifice and filter screens located in the water lines connected to the solenoid valve.

Dec 26, 2008 | Humidifiers

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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