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Honeywell HE120 humidifiers makes whining noise

Last year I installed a Honeywell HE120 humidifiers and now, when the drum turns it makes a whining noise. I have put some WD40 on the shaft, but it still whines.

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SOURCE: humidifier drum Honeywell HE120 is not turning.

This happened with my humidifier as well. When the mineral deposits build up to the point where the drum binds, and is difficult to turn, the gears on the motor will strip. The clicking you hear are the ends of the stripped teeth of the motor gear rubbing up against the mating gears. Suggest you pull the motor - just remove the wire nuts from the control unit (replace wire nut over the exposed 24 Volt wire on each as you do this), then loosen and remove the nuts on the inside of the unit holding the motor. A number of manufacturers offer 'clock motors' than have a 1 rpm speed, and flat slot to receive the drum spindle. I used a Loeb motor which is commonly available in hardware stores, and had to insert a couple of small washers as standoffs, so the coupler was the right distance from the drum spindle. Reattach the controller wires, and you're done.

Posted on Feb 17, 2010

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1 Answer

How do I wire up a Honeywell HE120 so it gets power only when the blower is on?


Hi,

You didn't say what kind of furnace you have, but here is a link to what is known as an "air flow" switch that will allow the humidifier to operate only when it senses air flow through the furnace:

http://www.alpinehomeair.com/viewproduct.cfm?productID=453057513

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Hello, if you mean the motor runs fine without the drum in place then it could be that the drum is not properly seated on the small motor shaft, also alot of times i see that the motor runs fine but once the drum is in place it skips and does not move due to the gear and shaft inside the motor being slightly craked or broken. If the drum is seated properly than the motor must be replaced.

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Feel free to respond as soon as you read this for confirmation. My responses will be provided often and quickly. Ensure that you read all the comments sent to you by me. I will read all your responses and comment from there on.

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2 Answers

Humidifier drum Honeywell HE120 is not turning.


This happened with my humidifier as well. When the mineral deposits build up to the point where the drum binds, and is difficult to turn, the gears on the motor will strip. The clicking you hear are the ends of the stripped teeth of the motor gear rubbing up against the mating gears. Suggest you pull the motor - just remove the wire nuts from the control unit (replace wire nut over the exposed 24 Volt wire on each as you do this), then loosen and remove the nuts on the inside of the unit holding the motor. A number of manufacturers offer 'clock motors' than have a 1 rpm speed, and flat slot to receive the drum spindle. I used a Loeb motor which is commonly available in hardware stores, and had to insert a couple of small washers as standoffs, so the coupler was the right distance from the drum spindle. Reattach the controller wires, and you're done.

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THE MOTOR ONLY TURNS THE SPONGE DRUM AT MAYBE 10X'S PER MINUTE. THIS IS A BY-PASS TYPE HUMIDIFIER THAT RELIES ON YOU FURNACE BLOWER MOTOR TO SUPPLY AIR ACCROSS THE SPONGE MEDIA. NOTICE THE 5"-7" ROUND HOLE MUST BE DUCTED TO THE PLENUM OR RETURN AIR. (IF MOUNTED ON THE PLENUM, THE HOLE HAS TO BE DUCTED TO THE RETURN AIR, AND VISA-VERSA.) CAUTION!!!IF YOU HAVE CENTRAL AIR? A "DAMPER" MUST BE INSTALLED AND KEPT CLOSED THROUGH-OUT THE "COOLING SEASON". SERIOUS DAMAGE TO YOUR COMPRESSOR CAN RESULT FROM TOO COLD OF AIR ... CIRCULATING AND "BY-PASSING YOUR EVAPORATOR COIL".

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