Machine is very noisy especially on silent mode.

Turn it on high. Put a kleenex up to the intake or discharge screen. It will push it away or pull it towards the screen depending on if you are on the intake or discharge side of the unit.

Check where wires attach to collector plates. Possibly there is a a burn mark there. Or these units also spark when humidity is very low.

If it were a car I'd say something to do with the belt. Maybe check that out.

sounds like the bearings are going bad on the motor check and make sure the fan blades aren't rubbing anything at higher speeds sometime's they will flex

The problem may be build-up on the blower wheel. When the Truman cell cover is removed, two screws are visible which secure the cover for the blower. remove them and the cover hinges. Keep opening and it will unhook. Use a stiff brush to remove soil from the blower wheel. The unit can be turned upside down over a trash can or better still, outdoors to remove the excess.

The clicking noise is the sound of the high ionizing voltage 'shorting' due to dirt or humidity or both which provides the pathway for discharge. Cleaning and completely drying the filter(s) does not always help, in this case switching the unit to a lower operational speed can mitigate this problem. New filter(s) may be needed to resolve the clicking.

blast bottom of unit with high pressure air from oxygen bottle. Wife has copd. Is on oxygen and I used her high pressure bottle. Works great. Unit works great.

Warranty on these units expired on the 30th of May, 2008 when the company's assets were acquired and liquidated by Hilco Consumer Capital, Gordan Brothers, and Bluestar Alliance. All warranties became void with the bankrupt status.

With regard to the unit that you cleaned, I am assuming that you cleaned it the usual way you always have and it is now making a statical noise or a vibrating kind of noise, correct?

While the unit is off, take out the insert, pick up the unit and turn it upside down. You will hear some beads moving from the elevated end moving towards the bottom. Turn it upside down again and let the beads move to the bottom again. After doing this a few more times turn it upright and put the insert back in. You just cleaned the static lines. Turn the unit back on and see if the noise is still present. If so, try cleaning the insert again and after drying, see if the noise is still present. It is usually some dirt present somewhere that causes the noise to persist. If you have completed everything and the noise still persists you need a new insert which you can get on ebay.

It took a while, however first check that the wire cleaning balls are free to move. The small grabbers do not always do their job. Next you will most likely find that the sizzle noise is coming from the top and or the bottom. Carefully turn the unit upside down then right side up again to clean the wire. Take a Qtip and dab with rubbing alcohol. Carefully and I do mean carefully put it in the unit and clean the wire where it is held on both top and bottom. Bata bing......... Hope this helps.

Hi jackkikay,

A faint buzzing sound is normal - - that's the high-voltage plasma discharge simulating lightning in a thunderstorm. If the room is dark you should be able to see a faint bluish-purple glow of the metal grid on the plate(s) inside. This should somewhat louder as you increase the setting.

It should not really be so loud that is stands out in the background of normal noises (refrigerator running for example). If the buzz is loud - - like something is shorting-out internally (loud crackling sound), that would signal a different problem - - I'd need more details about what you're observing. Approximate purchase day, specific model, number of plates, general condition of the interior would all be helpful if you deem the buzz to be too loud for normal operation.

If I can be of further assistance, let me know. If this helps or solves the issue, please rate it accordingly.

Thanks in-advance for using Fixya.com,

Jon