Question about Vicks Cool Mist V3800 1.7 Gallon Humidifier

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No power to unit

Used less than one season. while running one day everything shut off. it's like there is no power to the unit

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I have a 1099 general powered humidifier making a loud humming noise.


there are no moving parts in that humidifier other than the solenoid and it only moves open or closed are you sure the noise isn't caused by something else, maybe something close or even the furnace

Feb 23, 2014 | General Filters 1099-LH Humidifier

1 Answer

Flashing red flight


Its probably the cleaning light that comes on periodically to remind you to clean the unit. Shut off the unit AND when you do so hold down the power button for several seconds until the flashing red light shuts off. The cleaning light should stay off until the next cleaning is due.

Per the Air-O-Swiss FAQ:

Q: Cleaning light is flashing (AOS U650, AOS 7135, AOS 7142, AOS 7144, AOS 7147)
A: Switch the unit OFF and unplug it. Empty the water in the base. Rinse the base with hot/clean water. Do not submerge the base! Visually inspect the base for dirt or mineral build up. If soft water is used decalcifying the unit every 4 weeks with EZ Cal is suggested. If hard water is used the unit should be decalcified every 2 weeks. Do not forget to reset the clean light after resetting the unit.

Q: Reset cleaning light (AOS U650, AOS 7135, AOS 7142, AOS 7144, AOS 7147)
A: The cleaning light does not automatically reset. Hold down the power button (button A in instruction manual) until the light stops flashing. The light automatically comes on approximately 14 days after plugging in the unit.

Feb 15, 2014 | Air-O-Swiss U7142 Humidifier

1 Answer

2 months into the heating season I noticed a large puddle around my heater. the Aprilaire 600 unit was leaking. The distrution tray had a red substance around the water holes. Also the overflow drain line...


Mold can really cause problems with humidifiers-
They do need to be serviced, cleaned up, and something like weak bleach used to kill mold spores, -- get it all tidy and clean!
Were you able to clean out the drain line?-- and is it draining now?
And is the float valve shutting off the water flow, before it reaches the overflow drain pipe?
Another concern would be the soaking pad-- Has it been changed recently?

Tell us more--

Mack B

Jan 06, 2011 | Aprilaire 600 Humidifier

1 Answer

Sears humidifier is running at less than 50% after only one year


If your sure you have water supply to the unit,the float switch/valve is either clogged or defective.

Jan 09, 2010 | Kenmore Humidifiers

1 Answer

Ge Zoneline heatpump works fine in the summer but in the winter with 45 to 50 degree days the compresser hardly runs. By turning the thremostate you can get it to run for a short period. I have 6 of these...


These Ge Zonelines have and ambiant Temp control on the unit when the temp drops it drops out the compressor and goes to electric heat. This keeps the unit from getting iced up. They do go bad and sometimes they shut off to soon. I just replace them and everything goes back to normal. They are located on the outside part of the unit. Just slide out the unit and it is located I beleive on the right side of unit Rus.

Dec 17, 2009 | Humidifiers

1 Answer

Aprilaire 760 keeps running.


The humidifier should not turn on untill the furnace blower starts. Since the fan stays on. does the solenoid valve also stay on? If they both stay on you probably have a bad humidistat. If only the blower stays on then the circuit bourd in the humidifier is defective.
Good luck
HVAC Teacher

Feb 06, 2009 | Aprilaire 700 Humidifier

2 Answers

Humidity too low


I corrected the problem...RH is rising nicely!! Installed by "professionals" on my Trane XV90....I redid their wiring and now have the following setup...

600A water supply coming from hot water line.
Removed orifice inside incoming feed tube.
control incoming water flow from saddlevalve on hot water supply ( make sure its a nice solid flow, no drips, but no "force" too it either)..enough to insure entire evaporator unit is wet and water is slightly flowing out of bottom to drain.

I also have it wired to run when ever the furnace blower is on. Heat or no heat. XV90 is variable speed, and by doing this the 600a is always adding moisture, until it reaches correct RH%

Also, I disconnected the outdoor temp sensor. I went to Radio Shack and bought a 47K ohm resistor ( 1/2 watt....4 pack for 99 cents). Installed that in place of outdoor sensor...now runs in manual mode. Have unit currently set to number 5.



Jan 14, 2009 | Aprilaire 600 Humidifier

1 Answer

Furnace blower motor turns on with no flame burning


Hi!!! You might have a bad flame sensor its a single rod located in the burners its white..If the unit runs and then shuts off and on and off.change your flame sensor..Good luckk..

Jan 04, 2009 | Honeywell Power Humidifier: Furnace...

1 Answer

Aprilaire 600 just installed and showing an error code


No, it is not an accurate statement.

These units have simple configurations They have a water supply similar to a ice making referigerator, an enclosure connected to your supply duct that houses a prop fan and media, a seperate humidistat and a drain for excess water. Your unit may also include fancy controls including an outside thermometer & humidistat to avoid over humidification that can cause problems during freezing weather. The humidistat looks a lot like a thermostat and is located in your living space or in the return duct. The prop fan in the box pulls air from the duct, through evaporation media and back to the duct. An electric solenoid valve releases water that pours over the media.

If the humidiy is below the humidistat seting and the AC/heater is running, the Aprilaire fan starts and the solenoid valve opens. I suspect the facier controls include the flashing warning light.

The warning light spells problem. Aprilaire's customer service should be able to provide guidance for the homeowner in the form of simple checks. I suspect your contractor is avoiding a warentee call and the trip it requires.

A word of caution. These humidifiers can be powered directly from your air conditioning unit control board from an auxiliary connection. If the control board isn't rated to carry the current required by the Aprilaire fan, valve and controls or the Aprilaire encounters and electrical problem, the board can be damaged. This can be avoided by using a relay. The AC board switches a low energy relay. 120 volt house power is connected to load side of the relay and runs the Aprilaire.

My board cooked at a location near this connection, but I can't be sure that the load from the humidifier caused it since four of our neighbors also lost their board. It failed the evening of a snow storm and required a costly emergency after hours service call. The next day a new board required a three hour drive. Fortunately a fan powered propane heater kept our pipes from freezing.

Aug 27, 2008 | Aprilaire 600 Humidifier

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