Our HCM-640bw Honeywell humidifier will leak water onto the floor. If I fill the tank and let it sit without turning it on, no leaking. When it runs for about two hours it leaks bad. Any ideas on how to correct ?

I doubt if there is any warranty on this now. It has been over three years ago.

If you can locate a crack in the clear plastic tank, there may be a chemical you can buy to "weld" the crack closed. If you aren't sure what plastic it is, you might try sealing the crack with bathroom caulk that is mold resistant. You must locate the source of the leak and patch that.

"Take the humidistat out of the humidifier and look for the 3 slits below the restart button, take a hair dryer and send some warm air into those slits for 5 minutes. That usually recalibrates the humidifier."

you type in on the internet. www.appliancefactory.com
in the search bar type in your model number. it might take a minute to load but you will have 3 pictures that come up. click on any of them and scroll down alittle until you see water tanks. you can order them there.. or if youdon't want to go that route you can always try local hardware stores to see if they have it as well.

Thanks for your question,
Sounds to me like you have something partially cloging the misting nozzle, if you can take the nozzle off, and check it I would bet there is something that got in there, if you cant, it might be better to just return the Humidifier where purchased for an exchange, if you can get the nozzle off, if you have a can of compressed air like they sell for dusting off computers, I would use a very short burst of that in the nozzle, and in the feed line, thanks again for your question, let me know how it works out,
mr.grzz

Look for a microscopic crack in the water chamber. Leaking air will allow the water to continue to drain out of the tank. A bit of glue and duct tape over the crack should fix it.

This happened to me the second night of use.  Water all over the carpet and a dripping vent. I called customer service and they told me to remove the tank and filter, and run unit dry for an hour or so. Then restart it.  Worked fine after that.  I think we may have bumped it which is said to be the cause of most leaks.  Bummer is that after 5 night of use the grip on water tank slipped and the tank is in pieces.

I've been having problems with this unit since purchase in December 2007.

To fill, unscrew the cap with the spring loaded plunger. It may be tight, but it has two slots which you can turn like a screwhead using something wide enough (eg, a spoon) for leverage.

My problem is that this thing leaks badly. The fit of the cartridge is terribly designed. The one supplied is different from the one depicted in the unhelpful manual, which is silent on where the cartridge should fit. It will fit in one spot, but it will not sit flush with floor of the unit; it rocks and the water holding top rocks with it. The supplied cartridge appears to be an attempted and unsuccessful fix of a problematic design.

Even without the cartridge, this unit still leaks.

A web search shows others complaining about leaking. Hate to say it, but another example of lousy American design... but it sure is pretty!

Haven't been able to raise the manufacturer "Kaz" on the phone.

Good luck!

The filter should be located below the tank. the tank should lift off of the unit and there should be a rectangular cavity where the filter fits. You will most likely find the old filter dried up and filled with a white crust. That is salt and other minerals in the tap water that the filter catches.

My Air-O-Swiss U7142 has a leak from the very bottom. I found that as long as the water flows on to the "pan" that evaporizes the water, the water will come out from the bottom. Does anybody know how to fix this?