Question about Aprilaire 550 Humidifier

1 Answer

Noisey humidifier every time humidifier kicks on, it has a very loud noise like a 1 cylinder engine.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 11 Answers
Re: noisey humidifier

Not sure what type of humidifier you have but if is a power humidifier like the April 700 or 760 they do have a blower motor and it may be the fan blade is broken.But if you have a bypass humidifier is posible that your water solenoid may be making noise because of to much water pressure there is not much to a bypass humidifier, you may want to close the water supply valve a little at a time se if the noise goes away.

Posted on Feb 09, 2009

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I have a sunbeam sul2512um ultra sonic humidifier . I have had it for a less than a year . When I turn it on it makes a very loud noise where the mist comes at the base . Is there anything I can do to...

unfortunately thats the noiise a humidifier makes perhaps there are less noiser models on the market now you know as time goes by so technology becomes more amazing.

Nov 10, 2014 | Humidifiers

1 Answer

I have a 1099 general powered humidifier making a loud humming noise.

there are no moving parts in that humidifier other than the solenoid and it only moves open or closed are you sure the noise isn't caused by something else, maybe something close or even the furnace

Feb 23, 2014 | General Filters 1099-LH Humidifier

1 Answer

Loud vibrating noise when the furnace blower starts up.

Try closing damper slightly between humidifier and furnace????

Feb 03, 2010 | Aprilaire 550 Humidifier

2 Answers

My aprilair's humidifier motor began to make loud squealing noise

Put some lubricant, oil, WD40, etc. on shaft of fan. Spin the fan with your finger and work the oil into the shaft until the fan spins freely again. Reassemble and problem will be gone for 2-3 weeks. Repeat again until you want to replace the fan motor.

Dec 31, 2009 | Aprilaire 700 Humidifier

1 Answer

Aprilaire 550 makes extremely loud grinding noise when turned on

yes it should be bypass but solenoid could be trying to open but the voltage to it may be to low if you have 24v ac power at the 2 small wires. but to change shut down power to furnace and water to loosen the 2 compression nuts unwire they cant be reversed so dont worry then 2 mounting screws then reverse to install

Dec 17, 2009 | Aprilaire 550 Humidifier

2 Answers

Bad Problem with solenoid valve.

If the valve noise is excessive, or more than it was originally, then yes, replace the valve.

If the noise is no worse than it was originally, then you may be overly sensitive to the noise its making.

Also, check that the valve has not shifted slightly in such a way that it's opening and closing rattles it against something that it didn't used to rattle against. A sheet metal panel will amplify the valve opening and closing.

Let me know what you find.

Dec 12, 2009 | Honeywell Power Humidifier: Furnace...

1 Answer

Aprilaire 760 furnace humidifier makes a loud screeching sound.

A bad circuit board should not make any noises. A bad solenoid valve could make a loud buzzing noise. If the noise is a squealing noise then you have defective bearings in the blower motor.
If you disconnect the low voltage wiring from the solenoid valve and you still hear the noise, then its not the solenoid valve.

Apr 06, 2009 | Aprilaire 700 Humidifier

1 Answer

Loud clicking, banging noise

We recently had the same problem. After cleaning both the furnace filter and the humidifier water panel, the clicking noise (electric air filter) and the loud bang went away.

Nov 30, 2008 | Aprilaire 550 Humidifier

2 Answers

Loud "Glonk" when humidifier turns off

Try turning the water valve going to the soleniod down. There may be too much pressure. You may have to replace solenoid one more time after making the adjustment.

Mar 12, 2008 | Aprilaire 700 Humidifier

2 Answers

Noisy humidifier

A noisy humidifier may be the result of an unlubricated fan motor or a drive mechanism clogged by debris. Periodically clean the water reservoir, fan, and nozzle to ensure that they are clean and working properly. To keep your humidifier working smoothly and efficiently, lubricate the fan motor bearings with SAE #20 oil. Be sure to consult your owner?s manual for proper care and maintenance procedures. If it seems loose, vibrating parts are causing the noise: 1) Disconnect the power. 2) Remove the cover and look for any vibrating parts. Tighten screws, if necessary. 3) Wiggle the fan to see if it is loose on its shaft. If it is, tighten the mounting fasteners. Lubricate the motor's bearings if suggested in your owner's manual. 4) If it still makes noise, call an appliance repairperson or take the unit into an appliance repair shop.

Jan 18, 2006 | Honeywell HCM530 Humidifier

Not finding what you are looking for?
Aprilaire 550 Humidifier Logo

1,136 people viewed this question

Ask a Question

Usually answered in minutes!

Top Aprilaire Humidifiers Experts


Level 3 Expert

1033 Answers


Level 3 Expert

1751 Answers

Barrett Palumbo
Barrett Palumbo

Level 2 Expert

1772 Answers

Are you an Aprilaire Humidifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides