Question about Essick Air 4D7 800 13 Gallon Humidifier

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Assembly having trouble putting together new humidifier

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Re: assembly

Here is the link for the user manual for your humidifier; If you don't find what you need in there then try; Hopefully they should help. If you still get no luck then please post back again with some more details of what you are having trouble with, maybe post some photos as well and we can try and help :)

Posted on Apr 21, 2007

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Hi, I was cleaning my nearly new V150SG and one of the black rods broke. Any chance I can just find replacement parts? Many thanks! Carol or here!

I took my humidifier apart to see what was wrong with it and saw the carbon electrodes were caked with salt deposits. While cleaning them off, one of the electrodes broke about halfway down. I noticed the electrodes were hollow - about a 3/16" diameter hole down the middle.
I found a small diameter screw from a toggle bolt assemble, cut the head of the screw off, cut the remaining threaded piece to about an inch long and used it to splice together the broken carbon electrode. I reasoned that the steel piece is only touching the carbon pieces, and not the wire leads, it should be ok/safe resistance-wise. I put everything back together again, and voila, the unit worked!

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No water going to humidifier

Easy fix: Check the solenoid. Turn off the power to your humidifier and the central air unit. On the side of your humidifier is a brass solenoid. It can get clogged with lime and calcium. Most videos and instruction manuals tell you to replace the solenoid. No need if you can turn a wrench.

1. After all power is off turn the water off to the humidifier and disconnect the top line water line at the nut.

2. Disconnect the bottom line water line that will go to your humidifier.

3. Take a Philips screw driver and remove the two screws that hold the solenoid on the side of the plastic housing of the humidifier.

4. Leave the wires connected unless you need more room to work. If you disconnect the wires then label them with tape (colored) so you put them back on correctly.

5. In the inlet or outlet water pip of the solenoid is a trainer that may be clogged. With a paper clip pull it out and clean it. If it’s clearly clogged then stop and put all back together. That may have been your problem.

6. If it’s not clogged then it may be clogged inside the solenoid.

7. The nut on the end of the solenoid is silver. Take it off and the magnet (main power unit) will slide off.

8. Notice the flat head screw post on the end of the solenoid. Turn it and remove. Be careful as a small spring loaded plunger is inside.

9. Take apart and clean all parts. You should be able to blow air in the intake water line tube and it go out the out water line tube as well as were the plunger hits in the center of the solenoid. If not then it’s clogged.

10. If clogged then just soak all but any parts with rubber or plastic in a small white vinegar solution for a couple of hours to eat away that lime. If it’s not clogged then you probably have a bad solenoid.

11. To check and see if the solenoid is bad just put it all back together but do not re-wire the solenoid to the humidifier.

12. Turn on everything without the wires going to the solenoid (turn on meaning put power back to the unit.

13. When the system is running as it should without the humidifier and solenoid wires attached check the two lead wires with a volt meter for 24v. If you have 24v then you have a bad solenoid and need a new one. If no 24v then you may need a new control panel.

Hope this helps you out.

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1 Answer

New filter

I have been unable to find your manual.
But, on Emerson's own site they have this posted:

If you cannot locate your model in the available download manuals, please contact

I would contact them and ask for a manual.
Good Luck.

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You can call 1-800-955-7075 give them the make and model #.The part # should be 4217,10x113/8 frame for $14.56 plus shipping

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Honeywell has had lots of problems with this humidifier. They are coming out with a completely redesigned steam humidifier that will be available in a month or two. If you know who installed it (through equipment stickers and such) you can probably get them to swap your old trouble prone unit for the new design for just the labor. If they won't, then push them to talk with their Honeywell distributor about it.

The problem is most likely a stuck float in the humidifier. There are two floats that run up and down. One that tells it when to add water, and one that is a safety. They both tend to get stuck with mineral deposits.

You can fix it by unplugging the humidifier, turning off the water, draining the pan (unscrew the drain on the bottom a few turns), disconnecting the water lines and wires (2 molded plugs and 2 screw terminals-don't worry about if they get swapped). There should be a couple of screws that lock it into the ductwork such that when you remove the screws you can pull the whole unit out to see inside the water tank. Then just clean everything out well and put it back together in the same order.

You really do want Honeywell to get you a new humidifier though.

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