Questions tagged [humidifier]

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No Power To Humidifier

Hoping an expert here can help me out with an issue. I have a Goodman GMV9/GCV9 furnace and a General Aire 1042-L humidifier. When I went to replace the filter for the humidifier, I noticed it was dry ...
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What happens to quarter valve when I don't turn it on/off completely?

I have a quarter valve for the supply line to my whole house humidifier (fan-powered, by-pass type). It is on when pointing up (i.e. 12 o'clock) position and off when pointing to the right (i.e. 3 o'...
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Water in duct after installing steam humidifier

I had a steam humidifier (Aprilaire 800) installed a few weeks ago. It's controlled by an Ecobee thermostat. The steam dispersion tube is in a vertical return duct, above the air filter. Below the ...
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How do I know if humidistat is working?

Is there a way to test an Aprilaire humidistat to see if it works? I switched out the solenoid and it still does not work.
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mold on window sill due to whole house humidifier

In the winter my house's humidity naturally drops to 20%. We had a whole house humidifier installed and raised the humidity to 35%. The air is much more comfortable but we get condensation on the ...
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I replaced the cylinder on my Honeywell HM750 but the 'replace cylinder' light is still on

This is regarding a Honeywell HM750 Humidifier, I installed a couple of years ago. I just replaced the cylinder for the first time. Followed the instructions to the letter, and I checked the ...
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Wiring help for Generalaire humidifier

I’m installing a Generalaire 1042 drip humidifier. The wiring instructions aren’t that clear/detailed. The thermostat is MHX3C. It has connections C, NC and NO. The furnace is a Keeprite C9MPD075F12B1....
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Furnace will occasionally not turn on unless thermostat temp is increased

Occasionally (mostly in the morning) my furnace will not turn on. I have it set to 72. When I wake up the house temperature has dropped to say 64 or 65. If I turn the thermostat up to say 74, the ...
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Problem with water rushing through whole house humidifier

I have a Honeywell Enviracaire Elite whole house humidifier Model HE365A1006 connected to my HVAC system. When the furnace runs, the water is rushing straight through the middle of the water panel ...
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Aprilaire 600 to Fedders furnace

Wiring issue. I have installed the unit, an Aprilaire 600. When the humidifier is OFF, the heat and fan operate normally. However, when the humidifier is ON, the heat and fan come on normally but ...
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Are there better types of humidifier relays

I'm on my third relay in five years for my humidifier. One started buzzing and the other two stay closed until I tap them. Is there a better type I can buy or what do I need to look for to get a ...
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Adding a humidifier with oval-shaped duct on return

I have an oval return duct. Can I mount an Aprilaire 600 humidifier on supply side of furnace?
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Can I put steam humidifier nozzle above the AC coils

I'm trying to understand how the AC coils drain the condensation. I have installed a steam humidifier and connected to the top plenum above the furnace and AC coils. My worries are if the steam will ...
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Swamp Cooler AND Humidifier in One System

I am moving to Colorado, where having a whole house Evaporative (Swamp) Cooler is both effective and low cost option for cooling my home. Additionally, Colorado is drier, so a whole house humidifier ...
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1 vote
1 answer
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Aprilaire 400 solenoid valve gets stuck at opening resulting in buzzing (hammering?)

I meticulously DIY-installed this humidifier with automatic control 2.5 years ago. It worked as a champ for 2 winters. Supplied saddle valve never sat well in my stomach, even before I read up while ...
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How To Wire Humidistat and Humidifier - Honeywell

I am looking for advice on how to wire my new humidistat with my furance and humidifier. First, here are the components I'm working with: Furnace: Carrier WeatherMaker Infinity (Model 58MVP100 14120) ...
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What wires do I need to connect to get Aprilaire 600 working?

I just replaced an old Aprilaire with a new 600 model. I wired up all the previous wires to the corresponding spots on the new controller, but there are still open spots and when I turned power back ...
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How to Break Apart an Unbreakable Humidifier to Clean It

My humidifier of less than 1 year of use no longer works and Google says to clean mineral deposits. How do I break it apart to clean it and get it working again? When I google this, it doesn't show my ...
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Run humidifier while furnace is not heating but fan is running?

I've got a bypass humidifier mounted on my gas furnace, and an ecobee 3 thermostat driving both furnace and humidifier. What I like about having the ecobee drive the humidifier, is that it knows the ...
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1 answer
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Carrier Weathermaker 9200 Humidifier Ecobee blows 3amp fuse

I have a Carrier weathermaker 9200 with a bypass humidifier attached. I just moved into this house a year ago and the humidifier never worked with the humidistat. I tested the solenoid by putting a ...
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2 answers
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Humidifier connected to water supply WITHOUT a furnace

I want a humidifier that's connected to the water supply but I don't have a furnace (I have baseboards). Does that exists? I just want a humidifer that I don't have to refill every day or so.
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Wiring in a Aprilaire 500m to an older (11-86) Trane furnace w/o A/C

New here. I recently purchased a Aprilaire 500m with a humidistat installed on the return. It's working fine, sure... But I don't want water pouring down the drain while the furnace/blower is not ...
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Safe to install humidifier above furnace gas vent?

I'd like to add an AprilAire 600 bypass humidifier. I plan to install the humidifier on the supply plenum, and the bypass duct on the return air. The gas vent coming off the furnace is type B. ...
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1 answer
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April Aire 600 Humidistat Question

The humidistat was replaced. The wiring looks the same as it did before. However, the solenoid only opened when the blower was on. Now we hear the solenoid opening at all times of the night whether ...
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Why does my humidifier not come on when heat is on?

Our HVAC setup includes a humidifier, but the control board seems to activate it only when the fan is on without heat/cool. Here's how I got to that conclusion: I hooked up my multimeter to the ...
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2 answers
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Why did my humidifier water bottles get discolored inside?

I've had a stand alone type of whole house humidifier for many years. It has two 2.75 gallon white plastic water bottles. In addition to using an anti-bacterial with each fill-up, at the end of each ...
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1 vote
1 answer
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Aprilaire 600M Wiring to Honeywell TH8321 Stat

Very rookie DIY guy here...I have installed an Aprilaire 600M but can't figure out how to wire it. My thermostat currently is using the U1 port for a normally-closed damper on a fresh air intake. I ...
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1 vote
3 answers
2k views

Why place humidifer on cold air return

I'm trying to understand why a whole house humidifier is placed on the cold air return where water is injected into the air flow and then it has to pass through a five inch filter before entering ...
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2k views

How to troubleshoot a leak in an Aprilaire humidifier?

An Aprilaire 600M humidifier attached to my HVAC vent is leaking very slowly, about 2 ounces per day. I have not seen it leak but the leak is coming out near the exhaust at the bottom of the plastic ...
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Humidifier not keeping up with HRV

I just moved to an new (for us) house and we seem to not be able to keep the humidity up in the house. The house comes with a Heat Recovery Ventilator (HRV) that in the winter runs all the time on low ...
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2 votes
0 answers
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Should I expect a whole-home humidifier to provide consistent humidity throughout a 3-story townhouse?

I'm looking to install a whole-home humidifier in my 3-story townhouse in northern Virginia. I already have trouble keeping a consistent temperature throughout the 3 stories - should I expect similar ...
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Piping humidified air through a wall

I have very low humidity in an upstairs bedroom. For various reasons I cannot keep the door closed, so your average "single room" humidifier doesn't move the needle. It's a cold climate, so ...
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1 vote
1 answer
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What skills and tools do I need to install a whole-home humidifier?

I'm looking to install a whole-home humidifier and am wondering what tools and skills are needed for the job. I'm specifically concerned about a non-standard installation or if something goes wrong / ...
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Winter damper setting for humidifiers [closed]

Problem: My brother has a drum humidifier on his furnace and is quite satisfied with it, so I installed one on my furnace this fall. He claims it is a good idea to partially close the damper for ...
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1 vote
2 answers
779 views

Is this the correct wiring for Honeywell humidifier?

Additional Info: Make/Model of furnace: Bryant / 310AAV042090 Link to Installation Instructions: https://www.carrierenterprise.com/bryant-legacy-80-afue-90-000-btuh-multipoise-gas-furnace-310aav042090#...
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Humidifier and preventing ice formation

Is there anything that can be done to mitigate the effects of a floor humidifer on ice formation gumming up various systems in the house? I have learned that even RO water is not pure enough to ...
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2 votes
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Air purifier/humidifier - strange yellow substance

I have had this Sharp air purifier/humidifier for the past 6 months. After cleaning the humidifying filter today I have noticed a strange yellow slimy substance on the filter "fins". I have ...
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1 vote
1 answer
293 views

Should whole house humidifier leak cold air in the summer?

I've recently been learning a lot about sealing our HVAC ducts to improve system efficiency. On my mission to seal every accessible leak, I noticed my air conditioning/furnace cabinet joints were ...
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Thermo Pride OL5-85 oil furnace and Aprilaire 60 humidistat

I have a Thermopride OL5-85 furnace. I've recently added an Aprilaire 600 humidifier, which comes with the Aprilaire 60 humidistat. Wiring diagrams for both are attached below. The humidistat is ...
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Why do I read no voltage with my humidistat's solenoid is installed?

I've been troubleshooting my humidifier for a bit now (just learning this stuff as I go). It would appear the wiring for the furnace (apparently the transformer) meets the wiring for the humidistat ...
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2 humidistats for 1 humidifier

I have two zones in my house with a damper system and want to move away from using my humidistat to control the solonoid valve on my humidifier and instead use my Nest thermostats. My zone control ...
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Where should my humidistat on my whole house humidifier be located

I have a Trion cm200 installed on my air handler up in the attic of my house. Toward the end of 2018 I had an entire electric system installed in my house (duct work, air handler and outside ...
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1 vote
1 answer
873 views

Should whole house humidifier be draining when heater/fan is off?

I have an Aprilaire 700 whole house humidifier with a manual mode humidistat on the return. I noticed that the unit was draining water even when the heater/fan was off. Is this expected? I just hear ...
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1 vote
1 answer
286 views

Furnace shutoff switch outlet only hot when furnace is running

I have an old Aprilaire 700 powered by the 110v outlet on the side of my furnace. I recently replaced the old humidistat with a newer Aprilaire 60 Digital. This humidistat comes with the blower ...
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Aprilaire 600: No power coming out of humidistat

I am trying to trouble shoot my Aprilaire 600. It was already installed when we purchased the house 3 years ago but I don't believe we ever turned it on after purchasing the house in the summer. The ...
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What is the name of this water source for a whole house humidifier?

A plumber told me that the type of water feed I have tends to leak. I've owned the house for 10 years and it has never leaked, but I would like to think about upgrading. I plan to search the web for ...
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How should I know if my humidifier work?

I have a Aprilaire 600 Humidifier installed in my basement, as per the manual it should automatically kick off when the lack of humidity is detected. It didn't seem happening. After I adjusted the ...
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My humidifier sets off the breaker?

I live in an apartment with a flatmate, in Ontario, Canada. I have a Honeywell Warm Mist Top Fill Humidifier (HWM-340BC from Canadian Tire, I imagine it should be akin to HWM-340B here: https://www....
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1 vote
1 answer
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April Aire 600 powers off while furnace is firing

After having a new furnace and AC installed in the summer of 2018, replacing my 20-year old equipment, the existing AprilAire 600 whole-house humidifier behaves differently than before. During the ...
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3 answers
3k views

Would adding ice to a ultrasonic humidifier help cooling in summer?

During summer it's way too hot for me to sleep well. I currently use a fan, but it's so hot that it's not enough. I had the idea of having a sonic humidifier in front of the fan as the fan would ...
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