Question about Honeywell Power Humidifier: Furnace Humidifier/ Humidifier

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Humidistat installation question

I am looking at the Honeywell truesteam humidifier and wonder how you wire in the humidistat?

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The wireing diagram is a little confusing, need help to get it wired correct. have a true steam humdifier with a H8929 humidistat.

Posted on Jan 27, 2009

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I suppose you are looking at the do-it-yourself model. Depending on the wire that is run up to you Regular Thermostat from your furnace. You may have to run a seperate line for the Humidistat. A digital thermostat that does Humidity and Temperature is recommended. Or you could just place a Humidistat near the furnace room. A wiring diagram will come with the Humidifier discribing the different ways to wire it.

Posted on Jan 09, 2009

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I installed a honeywell 360a flow thru humidifier, and a new transformer. I have power thru the wires to the fan cover. Also the humditstat clicks when turned on. The fan does not work and the solenoid...


Posting a diagram of how you wired the installation will help the both of us figure out what the problem is. You don't have to accept or rate this solution in order to post comments or information. But accepting a solution will not stop you from communicating with the expert. You can still communicate with the expert as long as you need assistance regarding the issue stated herein.

Jan 11, 2011 | Honeywell HE360A1027 Whole House...

1 Answer

Wired a new 360 through Hum blew 3amp fuse. How to wire so it doesn't blow fuse. Have open EAC and EAC2.


Review figures 5, 6 and 7 on the installation instructions and compare with how you wired your installation.
The red wires are not used if you use a mechanical humidistat, (are used with electronic humidstat - supplies 24 volts and go to "hot", "commod" on humidstat). Yellow wired to "Hum" whether electronic or mechanical humidistat used.
If using sail switch or current sensing relay, cuts into one of the yellow wires. - One yellow goes directly to humidisat, then comes out of other side of humidistat & runs to to relay (or sail switch), and comes out of relay (or sail switch) and runs back to humidifier.

Dec 17, 2010 | Honeywell HE360A1027 Whole House...

3 Answers

Humidifier will not turn on (no fan, no water flow)


http://www.appliancefactoryparts.com/humidifiers/helpcenter/breakdowns/honeywell/honeywell-he360a1027.html
A breakdown diagram of parts etc above.
http://www.appliancefactoryparts.com/content/pdfs/110672-4.pdf
Shows you the HE360A.
To me it sounds like it is wired incorrectly, the solenoid should NOT get too hot at all. The PDF above shows wiring data.

Apr 03, 2010 | Honeywell HE360A1027 Whole House...

2 Answers

FROM A CONDO IN FL WITH HEAT PUMP---I HAVE A WHITE-ROGERS THERMOSTAT (2 STAGE HEAT-1 COOL) AND WANT TO WIRE IN A HONEYWELL H46C HUMIDISTAT FOR HUMIDITY CONTROL. THERMOSTAT HAS THE FOLLOWING WIRE POSTS E O...


It's a little unusual to add a humidifier in Florida. The ambient humidity is usually high enough.

But anyway, if you want to do this and assuming you have central air with forced air heating, you could install the humdifier in a standard configuration, then use a sail switch or differential pressure switch in the supply air duct to turn the humidifier off or on when you are in the heating mode only. The sail or differential switch will ensure that the unit can't run unless air is moving and you can tie the humidistat in to the first heat stage.

Mar 05, 2010 | Honeywell Power Humidifier: Furnace...

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

Two furnaces one humidistat help on wiring


Honeywell tech support is awesome here in Minneapolis, I think you need seperate humidistats but check with HW, number is in owners manual.

Nov 21, 2009 | Honeywell Power Humidifier: Furnace...

1 Answer

I've installed a Honeywell 220A whole house humidifier. I've wired the humidifier, sail switch, humidistat and transformer according to the directions, but nothing happens when I turn it on. No water is...


push sail switch forward by hand to see if that is the problem.
Remove two wires at humidifier and connect them if it starts than it is in wiring, humidistat, or transformer.

Oct 14, 2009 | Honeywell HE220A1019 Whole House...

1 Answer

I have a Honeywell House humidifier HE 225A-1006.


In order of probability:
1) (incorrect wiring) Make sure that humidistat is in SERIES wired with the furnace.
2) (shorted wires) Check that two wires to humidistat are not touching...use your glasses if you need them!
3) (bad humidistat) disconnect the humidistat and put an ohmmeter accoss the two terminals when it is turned on you should read 0 ohms, and when off it should read infinate ohms, if not pass both these tests, you need new humidistat.
That is it, there are no other possibilites!

Oct 12, 2009 | Honeywell HE220A1019 Whole House...

1 Answer

Wiring issue with the Honeywell HE360A Humidifier


Maybe I can help. this is 24v so it doestn't matter which wire goes where so here goes. 2 wires from humidistat go to furnace, split one of the wires(not both) so they reach the yellow wires on the humidifier. with marettsconnect one of the split wires to one of the yellow wires. do the same to the other split wire and yellow wire. what you should get is one wire from humidistat to furnace then one wire from humidifier to humidistat and one from humidifier to furnace. hope this helps

Jan 31, 2009 | Honeywell HE360A1027 Whole House...

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