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Tank and reservoir full, float free, refill light on so fan does not come on

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  • Merirose de Pooter Dec 03, 2012

    The float is fine and so is the rod. Must be the motor, I guess.

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Bad float

Posted on Dec 03, 2012

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1 Answer

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

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Float failed to cancel low water level when refilled


Welcome to china USA. LLC.
Most likey the 2 cent sensor that is connected to the float that tells that the reservoir is filled, has gone bad

Feb 24, 2015 | Hunter 34357 Humidifier

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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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Fan and tank lights won't run


I would look at the floating switch actuator. It's common for the float to bind up in the holder which keeps it in place. If the actuator is floating free, then look at the switch itself. Could be corroded or otherwise malfunctioning.

Nov 26, 2013 | Bemis 447 301 Humidifier

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Honeywell quietcare humidifier won't turn on


I am surprised that this answer isn't found anywhere, including in the manual from Kaz. If yours is the same version as mine, and your lights aren't even lighting up on top, most likely your float may have gotten bound up with gunk (the float rises up when the pan is full enough of water, which enables the motor to run. It is held into place by a plastic bracket with two phillips head screws, and looks a bit like a plastic bottle with a narrow neck in a small rectangular shape (not open at top). Remove the screws and the bracket, and take out the float and clean it and the reservoir (in the base) it sits in. Reinstall, and the float should move freely. Problem solved!

Oct 13, 2012 | Honeywell QuietCare HCM-630 Humidifier

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WATER LEVEL FLOAT DEVICE PREVENTS UNIT FROM TURNING ON,EVEN THOUGH WATER TANK IS FULL. REMOVED SOME FILTER MATERIAL WITH NO EFFECT. FLOAT IS FREE WITH NO RESTRICTION.


These hints are from the air o swiss webpage.
Q: No mist / unit is not working / empty indicator keeps flashing
A: Fill up the water tank. Check if water is flowing through the demineralization cartridge (attached to the water tank cap). If the water tank is full but there is only little water in the base it indicates that the water is now flowing through the demineralization cartridge.

  • Wait for 15 minutes to allow the mist to come out of the unit.
  • If the unit is not working and the empty light is not flashing you might have set the desired humidity too low and the current humidity level in the room is higher. That is why the unit switches off automatically.
  • If the empty indicator continues flashing and the tank is full, water is not flowing through the cartridge. Exchange the cartridge or the granules in the cartridge after 2-3 months, in areas with hard water exchange the cartridge after 1 -2 months. However, the demineralization cartridge and or the granules must be exchanged at the latest after 6 months or the unit does not reach its full performance.
If the granules are new, see the following instructions:

  • Make sure the cartridge and/or granules were soaked for 24 hours, water takes longer to filter through dry granules in cartridge and into the base. Next, remove 2 tablespoons of granules from the cartridge, and throw them away. Too many granules in the cartridge it does not allow water to flow from the tank to the base.
If your issue is with the float and not the mister, then you have to make sure the float is tripping the micro switch that turns the machine on. Some units the filter will not allow the float to hit the switch if the filter is not installed correctly. If everything is in correctly and the float is tripping the switch, then the micro switch must be faulty.

Apr 04, 2011 | Swiss AIR-O-SWISS Ultrasonic Humidifier -...

1 Answer

The tank empty light won't shut off even with water in the tank.


The float valve is probably stuck. Empty the water out of the reservoir and clean the tank with 50/50 White Vinegar and water.

Feb 09, 2011 | Sunbeam 1117 Humidifier

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

4 Answers

Not working.


A console humidifier that fails to humidify a room could have a bad humidistat, fan switch or float switch--problems that take specialized equipment to diagnose. But before you call in a pro, it's worth your time to test the fan motor and float assembly, since repairing them is something you can handle on your own. Testing and fixing the fan Steps: 1. Test the fan motor. While the machine is plugged in and full of water, turn both the humidistat knob and fan-control knob to high. If the fan hums but does not turn, or turns slowly, the motor needs to be replaced. If the fan won't move, you may have a bad switch somewhere. Call a professional. 2. To replace a bad fan motor, unplug the machine and disconnect the fan wires from the switch panel. You may have to pry apart a plug, use needle-nose pliers to pull the connectors off the switch, or unscrew the connectors. 3. Remove the old motor from its housing, using a Phillips screwdriver or a nut driver and socket. 4. Remove the fan blade from the motor. Use adjustable pliers to open the spring clamp at the center of the fan blade, and then slip the clamp off. Use a flathead screwdriver to gently pry off the blade, then set it aside. 5. Take the motor to an appliance store to buy a replacement. 6. Install the fan blade on the new motor, then install the motor and reattach the wires. Testing and fixing the float assembly Steps: 1. Locate the empty tank float assembly. This assembly consists of a switch, a connecting rod (on some units) and some type of float. It's supposed to shut down the machine when the water reservoir is low, but if the float jams in the down position, the dehumidifier won't turn on. 2. Check the float and connecting rod, if there is one. If the parts are bent and touching the cabinet, use gentle hand pressure to straighten them so they move freely. If your dehumidifier has a float switch that is triggered by the filter housing moving up and down, make sure the housing is centered in its tracks and moves freely. Clean any debris and dirt out of the channels, using a scrub brush. 3. Check that the float connecting rod is contacting the float switch. If it isn't, bend the end of the rod so it touches the switch.

Nov 29, 2005 | Honeywell QuietCare HCM-630 Humidifier

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