Question about Honeywell HCM535 Humidifier

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Doesn't humidify The humidifier turns on but stays at 25% humidity even though we set it at full power to 60%.

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Re: Doesn't humidify

Hi first of all: disassemble the device to its basic components and clean them well - clean the filter of the device well: take it out, wash it well with hot water, dont squeeze it let it dry ... maybe the humidity gauge isnt working ... check it with antoher gauge good luck

Posted on Feb 23, 2006

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I can't tell if it is working. The humidity reading in the house is 20%. When I open the humidifier, I see that the water is trickling over the filter but it doesn't seem to ever get saturated.

Hello, is there water going down the drain tube, if so then the humidifier is working. The pad does not really get saturated the water just trickles on the pad and the the fan blows it into the air duct. your outside air temp determines what your humidistat should be set at.

Outside Temperature -10 F 0 F 10 F 20 F 30 F Recommended Indoor
Relative Humidity
20% 25% 30% 35% 35%

Feb 23, 2011 | Honeywell HE360A1027 Whole House...

1 Answer

What is the gallons per 24hour output capacity of this unit?

There are several variables that will determine the gallons used per 24 hour period.
  • At what humidity level do you have it set for? The higher the level, the faster consumption.
  • How much air movement is there in the are in the house/area of the humidifier?
  • How air tight is your home?.
  • How may people occupy the home?
  • Whats the temperature setting for your primary heat source?
Let's assume that everything is perfect. Your humidifier holds approximately 6 gallons of water, when completely full. The ideal humidity level depending on the outside air temperature is 40 to 50%. Once the humidity level you have it set for is reached, the humidifier shuts off. When the humidity level drops significantly, it turns back on. So, as you can see, it's difficult to come up with an exact figure. But based on if everything was perfect, about 1.5 to 2 quarts per hour or almost 6 gallons in 24 hours.

For more details on this humidifier call 1-800-546-5637.

Hope this helps you.


Feb 09, 2011 | Holmes Products Cool Mist HM3500...

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No humidity in the house

Hello, the first to confirm is if you are receiving 24 volts at the transformer, if you are then check for 24 volts going into the humidistat and out of the humidistat, if voltage is confirmed there then check if your solenoid is recieving 24 volts, if it is and the solenoid is not letting water into the humidifier than your solenoid is bad and must be replaced. If you do not have 24 volts at the transformer then turn off power to the transformer and set your meter to read continuity, you should have resistance if not the transformer is bad and must be replaced. If you have power to the humidifier and not humidifieing properly then you have to set the humidistat according to what the outdoor temp is, the outside temp determines what setting and % of humidity you should have in your home. Here is a what it should be
-20 set to 15%
-10 set to 20%
0 set to 25%
10 set to 30%
20 set to 35%
above 30 set to 40%

Jan 25, 2011 | Honeywell HE365 Humidifier

1 Answer

I have an Aprilaire 550 hooked up to my furnace,

in order for the humidifier to come on with the heater there has to be a temperature sense curuit to turn it on/off at a certain temp, the humidity curcuit on the unit will turn it off at set %

Jan 31, 2010 | Aprilaire 550 Humidifier

1 Answer

Water only runs with humidistat in test/reset mode. Aprilaire 600 with an Aprilaire 56 Automatic Humidistat, both about 5 years old. Water line is clear, and test mode runs fine for the 1 minute interval....

you need to make sure your humidity level in the house isnt higher then what your humidifier will provide at any givin outdoor temp. this chart is in the owners manual. you cant remove the wires going to the ODS or it will give an error unless you have a resistor to put in its place. Anyway if the humidifier works in test mode according to AA it works so you may have higher humidity than you think, the highest your gonna get is 45% as the temp outside drops it will allow less humidity so it doesnt cause window condinsation (property damage) here is a copy of the chart. the #s on the left are the dial setting
TABLE 2 – % Relative Humidity Guide
Outdoor Temperature (°F)
-10°F 0°F 10°F 20°F 30°F 40°F
10% 10% 10% 15% 20% 25%
2 10% 10% 15% 20% 25% 30%
3 10% 15% 20% 25% 30% 35%
4 15% 20% 25% 30% 35% 40%
5 20% 25% 30% 35% 40% 45%
6 25% 30% 35% 40% 45% 45%
7 30% 35% 40% 45% 45% 45%

Nov 28, 2009 | Aprilaire 600 Humidifier

1 Answer

Won't humidify past 30% in a 90sf bedroom

The most probable reason that the humidifier does not reach the levels you describe is because you said you had the unit in your bedroom.

Bedrooms typically contain materials that are known as "hygroscopic." What that means in plain English is that items such as the bedding, mattress, any carpeting, wood, curtains, you, etc. all absorb moisture , kinda like a sponge. Since that moisture is being held by these materials, the air itself contains less by percentage. 25-30% humidity is actually pretty good for any room, especially in colder climates and higher humidity levels can lead to the production of mold, condensation on windows, etc., which are not good things. The good news is that reasonable humidity levels are healthier for textiles such as carpeting, cloth, and so on because the fibers won't dry out and crack. Dust is also reduced, but again, only to a certain level.

If your humidifier is reaching 30% it's probably working ok.

Mar 27, 2009 | Hunter 33201 Humidifier

1 Answer

Aprilaire 600 humidity level too low

you may try running your blower 100% of the time.this should allow the humidifier to stay on even when your not heating. once the humidity level gets to where you want it, you may be able to put the fan selector back to auto. also you mentioned you have a variable blower. this is great if it is set up to run at approx. 20% fan speed when it is not heating or cooling. at 20% you can circulate enough air through the house to humidify without being able to hear the noise of the blower. it will really increase the comfort level of the house if you tend to have hot and cool spots. if it was not set up this way, contact the installer and ask if they can do this for you.

Jan 26, 2009 | Humidifiers

1 Answer

The power light on my Bemis 4D-7800 humidifier flashes.

On my water wheel several parameters must be met. 1. Power on, cord plugged in. 2. Water in tank, the float arm needs to move to indicate water present, the red light on the dash indicates no water. 3. Humidity controll set higher than the room atmosphere humidity, clockwise is higher on mine. 4. The fan speed selecter must be on either high or low, the fan won't run unless one position is selected. I hope this helps

Dec 30, 2008 | Bemis 4D7-800 Humidifier

3 Answers

Doesn't run

When a humidifier doesn't run, it generally means it isn't receiving electrical power or the controls have automatically shut it off. 1) Be sure it's plugged in to an outlet that works and that it's turned on. Check the electrical receptacle for power, using a working lamp, appliance, or voltage tester. 2) If the receptacle seems to be dead, check the circuit breaker or fuse that serves the humidifier's circuit. 3) Check the setting on the humidistat. If it's set lower than the room's relative humidity, the humidifier won't go on; in fact, it may take several hours for the humdistat to respond to the room's changing humidity. 4) Be sure the humidifier's reservoir is full of water. 5) Unplug the humidifier unit. 6) Check the power cord. If necessary, repair the cord. 7) Remove the humidifier's cover panel. 8) Remove the humidistat and check it (as shown below). Replace it if necessary. 9) If it still doesn't work, call an appliance repairperson, take the unit into an appliance repair shop, or replace the unit. To check the humidistat, you?ll need a volt-ohm meter. A humidifier?s fan vaporizes the water in the reservoir and blows the water vapor into the house or room. If you need to check the fan, unplug the humidifier, remove the control panel, and lift the lid. Tighten the fan hub with pliers if it is loose; this should take care of rattles. If the fan doesn?t spin easily when you try to move the blades by hand or if it is still noisy, lubricate the motor bearings with oil. To establish whether power is reaching the humidistat when you know there are no problems with the plug or switches, unplug the humidifier, remove the control panel, and lift the lid. Test it with a volt-ohm meter set to the RX1 scale (or to K[omega symbol] or [omega symbol] resistance on a digital meter). Clip the meter to the humidistat terminals. The meter should jump if you turn the humidistat from high to low. If it doesn?t, you?ll need to replace the humidistat or return it to the manufacturer.

Jan 18, 2006 | Honeywell HCM530 Humidifier

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