Question about Honeywell Programmable Thermostat Heater

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2 wire thermostat and 2 wire humidifier

Ok I have an old house 1975 with the mercury switch thermostat and a humidifer adjustment next to it. When I pull each unit away from the wall they both have only 2 wires attached to them. Thermostat: Black & White wire Humidifier: Black & White wire I purchased a Honeywell RTH7600 7-day programmer. Question is: where do I wire the Thermostat wires to? and can I wire the humidifer wires into also? or have to keep it separate.

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: rewire an old 2 wire thermostat to a honeywell 5-1-1 programmable

I connected the blue wire to the R and the white wire to the W on the old thermostat and shoved the new Honeywell 5-1-1 Day programmable thermostat up the first guys *** that i ran into at Canadian Tire

Thanks for your help

Posted on Dec 29, 2008

  • 5 Answers

SOURCE: Replacing Round Honewell Mercury Thermostat

try to get one that is made for oil heat, the installation is easy only two wires, and the instructions make it easy.

Posted on Apr 26, 2009

  • 252 Answers

SOURCE: We replaced honeywell/newmac mercury thermostat

that the correct connection - bare wires touching or problem with new stat - is it set up correctly

Posted on Oct 18, 2009

Testimonial: "Thank you!!Model # is the 501M from UPM Marketing...Furnace stays on even when we disconnect the faceplate.Removed jumper-but should reconnect?"

  • 315 Answers

SOURCE: I just bought a Honeywell

I just installed a Honeywell 5.2 Day RTH2310B Programmable thermostat and I had to deal with the same situation: 2 wires, one white one black. After reading the edvice in one of the blog, the solution that worked for me was: BLACK ON Rc terminal and WHITE on W terminal. My furnace is running fine now. Hope it helps.

Posted on Dec 11, 2010

flatech
  • 111 Answers

SOURCE: How does one wire a 24 volt White-Rogers evaporative cooler controller replacement for an ancient mercury switched Honeywell controller?

Red wire, R with a jumper to RH
White , W
Green, G
Yellow, Y
Make certain you understand thermostats come setup for gas, so pay attention to what your heat/cool unit is, that's very important, also make sure to shut off the power to your system before removing the thermostat.

Posted on Jul 11, 2014

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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.

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Follow manufacturer instalation instructions. Why risk your equipment and you family's health to save a few bucks and a lil trouble on the proper parts. Your family is worth it, now go do the right thing. :)

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I have a Honeywell humidfier HE 220A with a KIP U147112 valve. Will turning the large screw head on the valve decrease the volume of water flow through the humidifier. Too much water is being wasted.

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No matter what setting is put on furnace humidifier, moisture forms on windows.House is only 6 years old and does have a lot of windows.


Hello WPwilkers, Well there's good news and good news!

First off, you should probably use the lowest possible setting as your house being so new, is likely pretty "air-tight" and as such, doesn't have a lot of air infiltration (gaps and drafts) hence the reason you're seeing moisture on the windows.

Now, I would also use a hygrometer, just like your parents likely had hanging on a wall somewhere in their house. It will give you a better idea of the moistur (humidity) around the house. My guess is that you're already at the 60%+ level of humidity.

I suggest that you turn "OFF" the furnace mounted humidifier, until you no longer see moisture on the windows. That will allow the house to adjust and get back to normal humidity levels.

Then you can start by setting the humidifier on the lowest possible setting and keep an eye on the moisture levels in your coldest room of the house, as that is where you'll first notice the excessive moisture on the windows (just the way it works - cold rooms get condensation on the cooler windows first).

If you don't have the humistat (the control for the furnance mounted humidifer) mounted next to your heating and cooling system thermostat, you should do that - it will make it easier to adjust and also will provide a more accurate reading for the humifier to operate properly.

Some Thermostats have the ability to add a humidifier on it for integrated controlling of the furnace humidifer. Check your Thermostat and Furnance owner's manual for details.

I used to have the same problem and found that by moving the humidifer control from the utility room (mine was in the basement of my house) to the living space, it made a big difference. Since most people's homes have unfinished basements and that's where the HVAC system is located, it doesn't get the same humidty readings as an occupied living space.

The other reason that you tend to get moisture (condensation) forming on windows is that the Percentage of humiditfication is set manually with the humidifier control, and yet, the outside (and inside) air temperature vary and the difference between them can cause the humidity levels to go from very dry to very moist, in a day or two.

I tend to wait until I notice that the air inside the house is getting dry and then turn on my humidifier, once the cold winter days have taken hold. In summary, nothing wrong with your unit, just mother nature and a well built (most air-tight) home are giving you higher levels of condensation than most older homes. Gradual adjustments, once you turn the humidifier off for awhile, should get you the desired results.

I hope you find this Very Helpful and best regards!

Dec 17, 2009 | Honeywell HE365 Humidifier

1 Answer

Aprilair 760 Humidfier will not stop water flow to EV panel


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Apr 09, 2009 | Aprilaire 700 Humidifier

1 Answer

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TLuzzo - The humidistat seems to be working when you turn it down. The wires for the solenoid should be hooked up to your furnace circuit board. The instruction manual will tell you where. If you dont have a spot on your circut board the A 50 sensing reley is they way to go. They are inexpensive

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1 Answer

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1 Answer

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It is possible you may have wired it wrong. Make sure your humidifer is not robbing power from your thermostat. This would explain when your humidifer makes a demand to come on it robs power from your t-stat making it lose its call for heat. Wire your humidistat to the "w" terminal and the common terminal so it only runs on a call for heat. With the bypass type of humidifier you purchased it wont do you any good to run when the heat isn't running anyway. If you want an independent operation humidifier you need a steam type.

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2 Answers

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