I just bought the HM500TG small unit, followed the instructions but no mist is coming out. The power light is, I turned the knob to the right but nothing still happens .

SOURCE: Just purchased a Holmes Hm495

Fill the tank up with cold water and turn up the volume control. Look for a clogged up nozzle on mister. Click on the link below to download and view the Holmes HM495C-UC user guide:

http://www.holmesproducts.com/ProductDetails.aspx?pid=1443

SOURCE: My unit is not producing

If the instructions didn't mention how to clean the unit of scale and mineral deposits, that's more than likely the problem.

If that's the case, here's what you need to do: Empty the tank of any more that's still in it and mix a 50/50 solution of White Vinegar and Bottled Distilled Water. Fill the tank with the solution and allow it to set 8 hours or over night. Then tunr the unit on and place your hand in front of the mist nozzle, to see if it's producing mist. If it is, let it run for at least 45 minutes and turn the unit OFF. Empty the remaining solution and refill the tank with Bottled Distilled Water. Run the unit until the tank is 1/2 empty and refill with more of the Bottled Distilled Water. Now, you're set to go. In the future, I'd recommend that you always use Bottled Distilled Water rather than tap water. As it's mineral and scale free.

Hope this helps to solve the problem. Please let me know. Thanks.