Troubleshooting your humidifier Troubleshooting your humidifier

Troubleshooting your humidifier

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In general, it is best to run your humidifier on a flat, level surface. If it is unstable or uneven, water may not flow properly which can cause leaking.

I’m noticing a film of white dust—what is it and how do I prevent it?
The humidifier does not add anything new into the air; it will only output whatever is poured into it. If you notice a layer of “white dust” after using the humidifier, the water used may have a high concentration of minerals. This is a common side effect of using hard water with an ultrasonic humidifier. To reduce mineral deposits, we recommend that you regularly clean the humidifier as detailed in the manual. Also, fill the tank with distilled water if your model allows. If distilled water is inaccessible, purified or filtered water are much better alternatives to tap water. Depending on your humidifier model, you can also use Levoit absorption pads found here (LV600HH) or here (top-fill models). Absorption pads help reduce mineral buildup (scaling) inside the humidifier, especially on the heating element.
What is scaling? How do I descale my humidifier?

“Scaling” looks like white flaky or chalky buildup along surfaces of the humidifier. It can be caused by high mineral content in hard water.

To descale your humidifier, soak the humidifier components in vinegar and gently wipe down the surfaces. For smaller crevices, you can use a pipe cleaner or a small brush to scrub off the scaling.

To minimize scaling, we recommend only using distilled or purified water in your humidifier and regular cleaning with vinegar.

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  • maki.kiyotaka


  • David W Jones

    This is a joke of a trouble shooting section. Soo many more things can go wrong than two items. Wake up and do the work.

    David W Jones
  • Richard Leslie

    Agreed, useless for any one with common sense; so many other issues never accounted for here

    Richard Leslie
  • Colleen Iafrate

    There is no batch number on my machine

    Colleen Iafrate
  • Gary Greenberg

    Dear Helpful One,

    I need your help so badly.  I bought the Classic 300S.  I wanted it so much to help me with my skin condition.  But I made a very bad mistake.  I misunderstood the directions and put the water in the wrong spot and now the darn thing doesn't work.  Please help me.
    Gary Greenberg
    (650) 272-6487
    Gary Greenberg
  • Liberty Voulgarakis

    I went to use it just now and does not work! what can I do?

    Liberty Voulgarakis
  • Matthew Bryant

    Ah..if only my humidifer had white dust or needs descaling..this would be a very helpful support section


    Matthew Bryant
  • Len  Kowalik

    Perhaps it is because I am using a dark theme, but the text "Was this article helpful?" is black on black, so not visible at all.

    Len Kowalik
  • Kathleen VanKeuren

    Not helpful at all. Zero stars. Company will not take phone calls.

    Kathleen VanKeuren
  • Donna L. Hildreth

    I put the tank on and the bottom of the humidifier fills with water and it won't work. 

    Donna L. Hildreth
  • William m Kent

    you people suck at resolving my issue, never again.


    William m Kent
  • Tonya Godwin


    Tonya Godwin
  • Tonya Godwin

    My humidity level is +6 percentage points higher than actual humidity.

    Tonya Godwin
  • Stephen L Blundell

    As stated, below, this is a joke of a service. Tried on previous page to describe issue only to receive nothing matches message.   

    Stephen L Blundell
  • Stephen L Blundell

    Submitted a request and over 2 hours ago, still open.  The white dust and scaling issues are already covered in the manual, and it appears they do not care to or do not have the staff to deal with any other issue.  I'm only here because the support phone number only provides a message to come to this useless support web site.  Believe we have a return item.  The corporation is 'Arovast' and while this product is 'levoit' I will be sure to avoid any product under that parent company. 

    Stephen L Blundell
  • Nina Sheppard

    Just bought this humidifier 1 hour ago. Worked fine and now doesn’t push out mist. I e tried everything from filling to dumping and filling again and wiping out.

    Nina Sheppard
  • Mary Cunningham

    How do I fix my humidifier acting like it’s out of water when the tank is full?

    Mary Cunningham
  • Amanda Sickels

    That's it? No other troubles to shoot? This didn't help at all!

    Amanda Sickels
  • Lori Gibson

    I bought this about 3 months ago and it worked fine.  When I hooked it up two days ago, it leaked all over the flat surface which is wood.  It has a 2 year limited warranty.  Of course I don't have the box.  Can I get a replacement?  

    Lori Gibson
  • Sergey Shmulevich

    I put water in the levoit dual 150 ultrasoni
    c and got water leaking in the barrow.

    Sergey Shmulevich