Even though the tank is full, I push down the Start switch and the refill light comes on 5 seconds later. Now, the only time the Refill light does not come on is if I hold down the start switch. I've already tried taking it apart and cleaning all of the components with no luck. I'm not sure what else could be the problem...
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!)
Looks like it's a know problem with the brand. I contacted customer service and they refused to sell replacement parts and asked me to ship the unit back for repair. I live in Canada and the cost just with shipping and custom will be higher than buying a new one. Recommend to be away from the brand.
The water level indicator is controlled by a float which contains a magnet and a magnetic reed switch. The magnet and the reed switch are very similar to the alarm system sensors to detect doors and windows opening. In the humidifier, the reed switch electric leads are made of a material that is getting corroded too easily into the humid environment of the this machine. After a while, the leads are so corroded that the electricity can not pass any more. This make the empty tank light to glow and at the same time it prevents the system to work the same way as if there would be no water water. Since the warm mist is produced by an electric water heater, it is important to stop it when there is no more water because it may cause an overheat and start a fire. The fix the problem you have to replace the reed switch, underneath the humidifier. Try to get the exact replacement part from the manufacturer. Never bypass the reed switch because the heater will not stop when it will run out of water. DO NOT BYPASS THE REED SWITCH. If you choose to replace the read switch only, you have to use the same model and locate it a the same height as the defective one. Don't mess up with a different reed switch without knowing what you have because some reed switch are normally open and other are normally close. Choosing the wrong type is equivalent to bypassing the reed switch with the same catastrophic consequences.
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The Main reason why it comes on is the water is empty. Beyond that.. try cleaning your machine. Also, I have two of these thing and I have yet to get it to work more than five minutes on high. Low.. it works all day long.
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.
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.
It may be clogged with mineral scale. Empty the water that you now have in the tank and refill it with a 50/50 solution of White Vinegar and Bottled Distilled Water. Let it soak for several hours and then turn the unit ON. If it starts working as it should. let it run another 5 minutes, turn it OF and empty the tank. Refill the tank with Bottled Distilled Water and allow it to run at least 45 minutes to flush the system. After that, if you do not detect any vinegar odor, you can continue to use the remaining Distilled water.
If the unit didn't work as it should have after several hours of soaking. Turn the unit OFF and let it soak overnight. If this solved the problem, I would recommend that you continue to use Bottled Distilled Water for normal operation, rather than tap water.
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?
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.