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Humidifier Running Continuously with Fan Blower

I installed a Honeywell 360 Whole Home humidifier on my Carrier infinity 80 unit. The humidifier starts and stops by sensing air flow. Everything works great in standard operation however the Carrier has a variable speed fan and it appears to be more efficient to run the fan continuously...hence the humidifier runs continuously and it uses a ton of water. Is there a way to wire the humidifier so it only comes on with heat or AC? I have a White Rodgers 1F95-1277 stat and the humidistat is located at the return plenum.

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  • Humidifiers Master
  • 1,669 Answers

As long as the humidifier start/stop is regulated by air flow there is no way to cycle it on/off with another device. If, however you disconnect that capability and, instead wire it to the heat on cool on switch it will only turn on when the stat calls for heating or cooling. You may need to install an intermediate relay off the stat wires to regulate the different(assuming that they are) voltage of the humidifier start/stop.What a fun project, thanks!

Posted on Jan 23, 2013

  • Josh Moore Jan 23, 2013

    Thanks! Good suggestion! Zero experience with intermediate relays but a good chance to learn.

    Would you know why the humidistat is satisfying at 10% when another shows 40% humidity in the house? Unit is in attic and humidistat is cut into and attached to return plenum. It acts like its reading the attic humidity instead of the return air? If I could get the humidistat to read the actual humidity in the house I would think the humidifier would just turn off when satisfied at 35% setting?

  • Leigh Perlmutter
    Leigh Perlmutter Jan 23, 2013

    It probably is, especially if the duct leaks around it or the real sensor tip is in the attic. Humidity meters are notorious for being way off callibration.

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Posted on Jan 02, 2017

  • 66 Answers

SOURCE: Water not flowing into HE360A

If you used the plastic tubing to the humidifier(I recomend copper) there should have been a little brass tube with a flare on it. This goes in the plastic tubing to grip the the sleeve better. See if this helps

Tinner
Sunsetmech

Posted on Dec 16, 2009

  • 189 Answers

SOURCE: HE220A1019 Whole House Humidifier

The humidifier is designed to "pull" the air through the water panel. After it does the humidified air will re-enter the plenum on the side of the opening that it is pulling in from. Just keep the water panel replaced every year and you will be fine.

Posted on Mar 29, 2009

HVACjake
  • 22 Answers

SOURCE: Honeywell HE260 leaks somewhere

Neither, even if the solenoid or humidistat stick, it should always drain properly. Is the unit mounted on the cold air return duct or the supply plenum? If it's mounted on the supply plenum, the water panel might be getting blown forward and spilling the water. High efficient furnaces also can leak water on the floor if its drain is restricted. If hum. is mounted on return duct make sure drain is clear by blowing through it. On Honeywell hum's I've seen the rubber hose from the solenoid valve to the distributor tray leak too, check the rubber 1/4" hose.

Posted on Jan 21, 2010

  • 2457 Answers

SOURCE: Excessive water usage with Carrier LBP humidifier.

hi the water runs down the pad the fan blows air across is , this controled by the stat which should control the water flow / on or off, this should be under warranty in the first year

Posted on Mar 04, 2010

tbreeze47
  • 3083 Answers

SOURCE: The change water panel light

I'm not an hvac guy, but I'll throw this in...is it possible that the relay contacts are welded closed, even though the relay has open coils? With all the power off, try to see if that's the case, and change it, but check everything ahead of the relay to make sure there's no short drawing excessive current.
Hope this helps.

Posted on Dec 19, 2010

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1 Answer

He360 fan and water run continuously


Check yor wiring, make sure you have sail or pressure switch wired in series with humidistat to humidifiers 24V power. Pressure or sail switch will disconnect humidifier when furnace fan is off. Humidifier (110V) could be connected to any closest electrical outlet.

Nov 10, 2013 | Honeywell HE360A1027 Whole House...

1 Answer

Fan and water run continuously on he360


I'm not sure what wiring option did you use, but looks like you did not include pressure or sail switches... When the furnace blower/fan is off it should open the 24volt circuit and close the water valve (normally close) and turn off the fan. If you can post more wiring details maybe pictures or hand sketch I'm sure problem can be fixed in the few minutes.

Nov 10, 2013 | Honeywell HE360A1027 Whole House...

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I just installed a Honeywell HE 360 Humidifier I purchased at Home depot. I replaced a Aprilaire model 110 . I have a 120v power duplex that is hot with the furnace blower motor, on so I assumed the sail...


Hello, in order to turn your humidifier on with the furnace the 120 volts coming from your humidifer you must hook it up to a step down transformer, then the transformer will provide 24 volts to you humidistat and solenoid valve. So you need a wire from the HUM on your control board to transformer primary side and a wire from neutral on the board to primary side of transformer. Then you need low voltage wire from secondary side of transformer to humidistat from humidistat to humidifier.

Feb 20, 2011 | Honeywell HE360A1027 Whole House...

1 Answer

I hooked the humidifer up and water keeps running it dose not stop when furnace stops. What might be wrong?


Hello, this could be tw o different things. when you install a humidifier you need a means of turning it on and off with the furnaces blower motor, this is done by either a sail switch, current sensing relay, or by the transformer being hooked up directly to the furnaces control board. if you do not have one of those three than the humidifier will run continuously untill u manually turn it off at the humidistat. If you have one of those three installed already than the solenoid valve is stuck and must be replaced.

Feb 08, 2011 | Honeywell HE220A1019 Whole House...

1 Answer

I have just completed installing a Honeywell HE220A humidifier to a Carrier Weathermaker 8000vs that was installed in 2003. My problem is that all the identified circuits in previous posts on the circuit...


I believe that Carrier has a 24 volt setup for humidifier but am not sure. On the circuit board I think there is a terminal (HUM). If there is this terminal connect 1 wire to this and 1 wire to C terminal.
If not,pretty sure there is a 120 volt EAC terminal. This would only kick on when blower is on. If you have to use this you would have to install transformer to the EAC connections

Jan 28, 2011 | Honeywell HE220A1019 Whole House...

1 Answer

I think this the model i have . The problem i have is the fan keeps running. Before once the furnace stopped shortly after the humidifier fan would stop . Now it just runs. I tried unpluging it to reset...


I think what your saying is the humidifier runs continuously. Check the wiring diagrams on the back page of the installation instructions.
You may have to install a sail switch to control the humidifier so that it only runs when the furnace blower runs (there are a couple of other ways to do this, but on older furances, this might be the easiest (it's the method I chose).

Nov 30, 2010 | Honeywell HE360A1027 Whole House...

1 Answer

Excessive water usage with Carrier LBP humidifier.


hi the water runs down the pad the fan blows air across is , this controled by the stat which should control the water flow / on or off, this should be under warranty in the first year

Mar 01, 2010 | Carrier LBP Humidifier

1 Answer

Honeywell HE260 leaks somewhere


Neither, even if the solenoid or humidistat stick, it should always drain properly. Is the unit mounted on the cold air return duct or the supply plenum? If it's mounted on the supply plenum, the water panel might be getting blown forward and spilling the water. High efficient furnaces also can leak water on the floor if its drain is restricted. If hum. is mounted on return duct make sure drain is clear by blowing through it. On Honeywell hum's I've seen the rubber hose from the solenoid valve to the distributor tray leak too, check the rubber 1/4" hose.

Dec 28, 2009 | Honeywell HE260A1010 Whole House...

1 Answer

I have a carrier furnace, humidifier valve popped fuse


hook up the new transformer to the white (common) from the blower motor, and the lead from the blower motor hooked up to the heat term on the board. (just cut the wires and wire nut all three together)

Nov 18, 2009 | Honeywell HE360A1027 Whole House...

1 Answer

Honeywell HE 260A1010


control board has eac terminal . will provide 110v to hum transformer anytime fan running.

also can pick up current sensing relay to sense blower power up and will then power the Hum. transformer.

Oct 25, 2008 | Honeywell HE260A1010 Whole House...

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