My air purifier was doing the same thing. The ticking noise you are hearing is caused by dust build up on the ionizer pins. When the ionizer pins collect too much dust, they tend to start making the clicking/ticking sound caused by static electricity. The solution is simple. Take the filter out and clean it real good (follow directions on filter on how to clean). Now, with the filter out, if you look down inside the vent where the filter was, you'll see a white piece of plastic with nine holes in it that are about the size of a silver dollar. Directly in the center of each hole there will be something that looks like a needle, those are the ionizer pins and they will probably have dust built up on them. Next, with the filter out, blow out the air purifier with compressed air to clean all the dust off the ionizer pins. This should take care of the problem, it worked on mine.
Kaz Honeywell ...
on Jan 12, 2008