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Refill light the refill lite stays on all the time even though the tank is full.

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3 year old Essick tower D46720 sat during off season. Cleaned, filled and plugged in today and will not turn on. Lights are on; nothing happens.


The red water level light was on even though both tanks were full. The white float behind the filter WAS stuck to the bottom of the tank. I just moved it to its floating position and voila! it is working.

Nov 21, 2016 | Essick Air D46720 6 Gallon Humidifier

3 Answers

My air-o-swiss 7142 humidifier keeps giving me the empty indicator light to signify no water in the unit even though the base and the tank are full. If I try to reset it comes on for seconds and then shuts...


The water sensor is a float in the mister area of the base. The float is off in one corner with a little plastic barrier around it and translucent cap over it. Make sure the float can more freely. If the float can move up and down but the light stays on, the reed switch (a switch controlled by a magnet built into the float) inside the unit might have been knocked loose, damaged or disconnected. The switch is actually inside the post that the float slides on, but it can only be accessed from the underside - inside the unit.

Sep 20, 2008 | Air-O-Swiss U7142 Humidifier

1 Answer

Ultrasonic humidifier's fan isn't running, the light indicated red instead of blue, and there is no mist coming out. How to fix it please since we cannot afford for another one right now.


I had the same problem. Looked up the manual online. Red light indicates water level is low I had just refilled the tank so that was not the problem but manual said to make sure water tank was firmly, securely seated on base. I unplugged the unit, unscrewed the plug on the tank and screwed it back on and then made sure the tank was securely seated on the base, plugged it in and it started working. If the tank is full you may just have to make sure the tank is fitting properly in the base.

Feb 05, 2014 | Homedics Uhe-oc1 Cool Mist Ultrasonic...

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Water refill light prevents unit from working. Tank is filled . Unit has been cleaned


Your problem is most likely a damaged Ultrasonic Disk (sensor).

If your product has not been used for a while, this piece was most likely damaged if it wasn't properly cleaned before storing. Cleaning well sometimes isn't even enough for this sensitive unit.
Unfortunately, there is no way to get this part, even though it is easily removed and could be easily replaced. Bad PR on the manufacturer's part. Your only solution is to send it for repair (if under warranty, you just pay shipping, if not, you pay shipping and $30) or to buy a different brand. You would think for as expensive as these machines are, the manufacturer would have a better solution to this extremely common problem.

Jan 13, 2014 | Germ Guardian H-3000 Ultra-Sonic...

1 Answer

Reset light keeps coming on humidifier


I am having this exact same problem, have you found a solution?

Jan 22, 2012 | Sunbeam 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

1 Answer

Clean/refill light


My Slant Fin humidifier has a floating, ring-shaped magnetic level that isn't replaceable. You can't even tell it's magnetic until you cut off the piece that prevents the white plastic float from rising past a certain point. It turns out that there is a ring-shaped magnet in the float.

I found that the Refill light would go off when I held a strong magnet near the float device.

So, I have suspended the magnet with string from the top of the humidifier outside the humidifier.

Caution: This fix disables the safety feature inherent in the low level shut off. I wonder why the manufacturer uses material that corrodes?

Oct 14, 2007 | Slant Fin Warm Mist GF-350 Humidifier

3 Answers

Left Tank won't empty


Eureka! Solved my "left bottle not emptying" problem. The problem was not with the bottle but that the top of unit which houses the on/off switch was not seated properly. It takes only a very slight difference in water level for the float to activate the switch, therefore if the top is raised even 1/4" the unit will shut off before the water level is low enough to allow the left bottle to drain.

Feb 26, 2007 | Emerson HDC12 Humidifier

3 Answers

Refill light is on, but the water tank is full


In the manual it says that you should clean the heating element. Unplug the machine, lift off the water tank, pull the lever under the tank and lift off the power unit side. If there is too much build up on the element from mineral deposits, the refill light may remain on.
Unfortunately, I have cleaned mine, soaked it in vinegar, made it look nice and new...and it still doesn't work. I am really annoyed as I have not had this humidifier long and have taken really good care of it. I do not want to throw it out. I am going to call customer support and find out if there are any other solutions. (I got a new one for Christmas and do not want to open it until I am sure that it is not fixable!)

Dec 06, 2006 | Honeywell Warm Mist HWM-2030 Humidifier

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