Question about Honeywell Power Humidifier: Furnace Humidifier/ Humidifier

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Furnace blower motor turns on with no flame burning

Sometimes my furnace motor will turn on when there is no flame burning. It is a johnson air ease sx 90 high eff furnace. It will run for a couple of minutes and shut off, then sit idle for 30 sec and then the power vent and flame will kick on and the unit will work fine. It doesnt really hurt anything just wanting to know how to fix it. Thanks

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  • lweaver597 Jan 05, 2009

    Thanks. I will try it and post the results!

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Hi!!! You might have a bad flame sensor its a single rod located in the burners its white..If the unit runs and then shuts off and on and off.change your flame sensor..Good luckk..

Posted on Jan 04, 2009

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1 Answer

How do I wire up a Honeywell HE120 so it gets power only when the blower is on?


Hi,

You didn't say what kind of furnace you have, but here is a link to what is known as an "air flow" switch that will allow the humidifier to operate only when it senses air flow through the furnace:

http://www.alpinehomeair.com/viewproduct.cfm?productID=453057513

Jan 26, 2015 | Honeywell HE120 Humidifier

1 Answer

Is Aprilaire 500M suppose to turn on when furnace motor turns on?


The humidifier should turn on and off with the blower motor of the Furnace. This can be done by wiring the the humidifier to the HUM terminal on the furnace control board and then stepping down the power with a transformer. If the humidifier has it's own tarnsformer then a current sensing relay can be used by attaching it to the blower motors common wire.

Jan 13, 2013 | Aprilaire Humidifiers

1 Answer

Water constantly runs when furnace is on or off. I wired it exactly how the diagram said but the water never shuts off.


Hello, In order for the humidifier to turn on and off you need either a sail switch or current sensing relay. A sail switch senses air flow and will turn on the humidifier when the blower motor kicks on and a current sensing relay senses current through the blower motors common wire. If you have either of theses hooked up already and the solenoid valve remains open then the solenoid valve must be replaced.

Jan 24, 2011 | Honeywell HE220A1019 Whole House...

1 Answer

Is the humidifier supposed to turn on when the furnace does. Does it turn on more often when the temperature outside is higher.


Hello, Yes the humidifier should turn on when the blower motor on your furnace kicks on, this way you are only using water and power when the furnace is on instead of wasting it when when the furnace is off. Regardless of outside temperature the humidifier will only turn on and off with your furnace.

Jan 21, 2011 | Aprilaire 700 Humidifier

1 Answer

Will the water only come on going thru the water solenoid only when it calls for water? Or is it suppose to come on at all times when furnace comes on?


The water should come thru the solenoid valve when the furnace's blower motor turns on, and turn off when the blower motor turns off.

Jan 04, 2011 | Aprilaire 600 Humidifier

1 Answer

The water runs constantly, not just when the furnace turns on.


Do you have a sail switch or current sensing relay with this humidifier? In order for the humidifer to turn on and off u need either a sail switch that senses airfllow in the return air duct and will turn off the humidifier when the blower motor stop or a current sensing relay that senses current on the blower motors common wire. I will post of pic of each one

Sail switch robhvac47_3.jpg


Current sensing relay robhvac47_4.jpg

Jan 03, 2011 | Aprilaire 700 Humidifier

1 Answer

Instructions on how to install the current sensing relay i had my furnace serviced and the tech told me this is what i need but if i can do it myself id rather the part is $60


You take the current sensing relay and put the blower motors common lead thru it, usually will be the white wire going from motor to control board. Then you take one of the wires from the current sensing relay and attach to humidistat and then take the other wire from current sensing relay and connect to transformer. This way everytime the furnaces blower motor turns on the humidifier will turn on and when the blower turns off so will the humidifier.

Dec 17, 2010 | Aprilaire 50 Current Sensing Relay...

1 Answer

Dry house, albeit have two april aire humidifiers


The reason you can not run your humidifier while the blower is off, is because all the humidity would condense almost immediately and rot out your duct work. If you find that the humidity provided during the cycle of your furnace is inadequate, I would suggest purchasing a table top unit, and keep it in the room where you spend the most time. So, the answer to your question is no, you can not run a humidifier while your blower motor is off. Hope this helps.

Dec 13, 2009 | Aprilaire 700 Humidifier

1 Answer

Furnace blower blows cold air


It is possible that you did not set the new blower on the proper speed. Black wire is high. Blue is medium. Red is low. If the fan is operating to slow it can run to hot and trip the high limit control. Make sure the filters are clean. When the old motor went bad, the problem might not have been discovered rite away your high limit control might need to be changed.
Also anytime you work on a furnace you can kick up some dust. Always clean the flame sensor.
Good Luck
HVAC Teacher

Mar 08, 2009 | Honeywell Power Humidifier: Furnace...

1 Answer

Furnace pilot problem


check the pilot gas pressure, might be too weak and blowing out when the blower starts, the clicking noise is the gas valve shutting down when it detecks no pilot flame, that park is normal.

Jan 10, 2009 | Honeywell Power Humidifier: Furnace...

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