Honeywell HWM-450 4 Gallon Humidifier - Answered Questions & Fixed issues

get a better brand as 2 failures of the same brand indicate design faults report the matter to the manufacturers engineering department and ask questions as to why the failures occur

Here are a few things to check: -make sure the heating element is clean. If there is a thick layer of scale (mineral deposit), then the unit will not turn on. -there are magnets on the water reservoir that allow the unit to turn on. If these magnets are not lined up properly, then the unit thinks there is no tank, and thus, not turn on. -turn the humidity up past your target point. The humidity near the unit could be a lot higher than the rest of the room, causing it to shut off prematurely. Hope this helps!

This is a posting from someone other than myself...however, it presented a good solution.

A solution to the problem with the fill cap failing/leaking. It was/is not the cap, it's the gasket/grommet/o-ring. Remember "THE MAGIC BULLET", well the gasket, that's where you tighten the top to the bottom, some are white and some are black, THEY FIT the Honeywell HWM450!!! ------- Problem solved.
SEE EBAY: NEW AUTHENTIC MAGIC BULLET 4 REPLACEMENT GASKETS SEALS

Recommended:
Yes

Amount Paid (US$): 45.00
Battery Life: N/A
Noise Level: Almost noiseless

I found a solution to our problem with the fill cap failing/leaking. It was/is not the cap, it’s the gasket/grommet/o-ring. Remember “THE MAGIC BULLET”, well the gasket, that’s where you tighten the top to the bottom, some are white and some are black, THEY FIT the Honeywell HWM450!!! ------- Problem solved.
SEE EBAY: NEW AUTHENTIC MAGIC BULLET 4 REPLACEMENT GASKETS SEALS

I chucked it out and bought another humidifier - not Honeywell.

the website that you can go to to order is www.appliancefactoryparts.com. type in your model number, clickon a picture once it loads and then scroll down the page until you see water tanks. right now the price is 39.99

I usually just balance the tray upside down on top of the base and fill the edges with vinegar. You could also put the the tray in a bowl filled with vinegar and submerge the whole thing.

solonoid valve not shutting off on water line .

Question edited for clarity, hemostat to humidistat. A hemostat (also called a hemostatic clamp, arterial forceps, or pean after Jules-?mile P?an) is a surgical tool used in many surgical procedures to control bleeding. (Hemo - Blood) For that you will need dealer service. The only thing you can try is a Power Reset. Turn off the power to it by removing the power lead for at least two hours to reset the control board. https://www.google.com/search?q=Honeywell+Trueease+HE+250a-1005+short+cycling ..

It sounds like the wiring for the humidifier may not be correct. The solenoid valve, which controls the flow of water to the humidifier, should be wired to the humidistat and the transformer, not to the furnace or fan. It is possible that the bottom wire of the solenoid is connected to the wrong terminal on the transformer or humidistat, or that the top wire is connected to the wrong terminal on the humidistat. I recommend consulting the installation instructions for your specific humidifier model, or consulting a professional HVAC technician to verify the correct wiring.

The drive belt is broken then and it needs to be replaced.

Sounds like the high pitched noise is coming from the solenoid valve which allows water to enter the humidifier. Typically when the water pressure is too high, it causes this high pitched sound at the solenoid valve. You can adjust the water pressure a little at a time and see if it helps, just make sure you’re getting enough water across the water panel.

You may be able to get a schematic from Honeywell that shows the connection points.

The obvious solution is to replace the humidifier that became defective while in storage.

Very first thing. If it won’t turn on, unplug it, and check the cord....especially if you have, or have had, a rabbit that has already chewed through every other wired devices you have ie: TV, satellite dishes, DVD players, other electrical cords.
I got my humidifier year before last and only used it a few times that year. Our humidity was fine until now, so the humidifier was still new as far as I was concerned. I checked every online help suggestion before I remembered Buster. Sure enough....exposed and partially chew wiring. I thanked God that I hadn’t been shocked.
Thank you, Daddy, for teaching this 70 year old grandma how to splice wiring and install other electrical wiring when I was a teenager. I miss you so much.
CAUTION: UNLESS YOU KNOW EXACTLY HOW TO SPLICE WIRING DON’T THINK YOU CAN FIGURE IT OUT. TAKE YOUR APPLIANCE TO A SPECIALIST TO GET A BRAND NEW WIRE PLACED ON YOUR APPLIANCE. I CANNOT EMPHASIZE THIS ENOUGH. IN FACT, TAKE IT TO AN ELECTRICIAN ANYWAY.

https://www.ebay.com/sch/sis.html?_nkw=Kip+INC+Solenoid+valve+Honeywell+32001876+U147112

Needs to be wired to work on the blower circuit. You must be drawing power from a source that is always on

That means it is time to replace the UV bulb.

Bypass Humidifier HE225 265 Check the manual and the support options. This is a water valve that is not sealing

This should help