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NickG

New dryer works great, but fills house with a hum noise

26 posts in this topic

Never had this issue. Standard Whirlpool dryer like I have had for years, but it fills the house with a low, audible hummmmmmmmmmmm..... the dryer itself makes this noise. I hate to have to go through returning this thing. Any hope?

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Is it a 60 cycle hum? Coming from the motor?

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I don't know what that means, but I can't be sure if it is motor or a hum created by the over all operation of the dryer. My guess is that it is a motor hum.

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Eh, I called the store. They are looking into it. Hopefully there is a solution.

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The early stages of a motor failure exhibits the famous 60 cycle hum.  120 volts is supplied to the motor; if any of the windings begin to short; there is not enough induction, the rotor of the motor stalls and eventually locks (locked rotor amps) draws excessive current and trips the internal/external overload on the motor. Before this occurs, if a winding in the motor is shorting, you will hear a buzzing noise which is the 60 cycle frequency of the 120 volt supply indicating (perhaps) a failing motor.  

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Ok, no not a buzzing noise.  It doesn't always occure right away.  Seems to send a frequency through the house as it warms up.  Just an annoying hummmmmmm... in every room, especially the one directly above it.  The store sent out a tech from Doc's Appliance (the repair business they use).  After sticking around for a while, the noise finally occured, then stuck around for the rest of his visit.  He agreed that it is very annoying.  He didn't know what to do since it didn't sound like the dryer was "defective".  The tech is coming back out with a supervisor.

 

One thing I noticed.... and maybe all dryers did this, but I never took note of it... listening to the air flow outside, there is a regular, continious slowdown/almost stalling of the rush of air.  It is obvious that this occurs when the clothes drop in front of the air outlet inside the dryer.  I really do not recall ever hearing this obvious drop in airflow before.  Seems very obvious on this new dryer.

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In old well worn dryers , i have seen a gasket rub noise

Whirlpool's where well known for this , it would even turn into a squeal as the dryer comes to a stop

the repair is a spray silicone , sprayed on the rear felt gasket from the outside of the drum

and a little vegetable oil (just a few drops ) on the front felt strip 

I have "cured" a lot of noisy dryers this way

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For the record, this is a brand new dryer. Had it less than a week.

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Two things seem possible: First, it is possible the dryer is generating electromagnetic interference--i.e a bad motor or control, or Second, (which seems more likely) the dryer is "harmonizing" (syncing) with some other piece of electronic equipment in the house. This is why some appliances that are electronic now have "line filters" to stop unwanted interference between electronic devices. Unplug all other electronic devices in the house and then try running the dryer. If the hum goes away, then you've found the source--electromagnetic interference.

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I've seen loose strings on dryer elements vibrate and hum, not unlike a guitar string. I generally have found this on the large circular GE elements. But just in case, does this noise happen in the air fluff cycle as well?

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Also, a possibility (if it's a gas dryer)----gas valves on some WPs now causing a "hum". 

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Many gas valves on Whirlpool built machines develop a loud hum, takes a new valve to correct

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The "doc" came out again today and insulated the bottom bracket of the motor.  I thought that did the trick, but no.  Hour after he left, the hum is back more than ever.

 

I will shut anything down to see if it the electromagnetic interference.  I will also crawl around the dryer to see if I hear it more near the gas valve.

 

I did call the store and it looks like this will be going back for a different dryer in a few days.  As always, thanks for all the clues thus far.  We shall see....

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Only things on were the washer and TV.  Shut them both down and the noise was still there.

Turned dryer to fluff.  Took off inspection cover to make sure no flame.  Noise was still there.

Putting an era to the top of the dryer, you can still hear.  Putting an ear to the side of the dryer, it is VERY loud that way.

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When the doc had the unit apart, did he check the mechanical features of the unit---rollers, bearings, idler tension? If the noise came back an hour later (assuming you were running the unit about that amount of time) you may have a shorted motor winding or mechanical failure on the unit that is heat induced.  Can we have a model number and which side of the dryer is the noise coming from standing in front of the machine?  

Edited by Wingerman

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Oh, so now it's a gas dryer?  Now that's why posting model numbers is important. Where I'm from, if you say "standard dryer" you sho' ain't talking 'bout no gas. I should have nipped this post it in the bud when I didn't see a model number but I was assuming standard meant....well... I promise to be more vigilant next time.

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Problably will not apply to your particular issue but...

 

If the dryer has been converted to vent from the side rather than the rear (side discharge conversion kit)...

 

On occassion---the metal plate that is installed---at the rear of the dryer to cover the original vent hole---can be a source of noise.

 

Usually a "bzzzzzzzzz" sound.

 

Correction: Add insulation/sound deadening on metal cover (eliminate metal-to-metal contact).

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Problably will not apply to your particular issue but...

 

If the dryer has been converted to vent from the side rather than the rear (side discharge conversion kit)...

 

On occassion---the metal plate that is installed---at the rear of the dryer to cover the original vent hole---can be a source of noise.

 

Usually a "bzzzzzzzzz" sound.

 

Correction: Add insulation/sound deadening on metal cover (eliminate metal-to-metal contact).

had that happen to a dryer once after I installed it...couldn't figure what the hell was going on...found out the vent was buzzing...hadn't been changed, but could have been moved during transport (and no, I didn't use the dolly from the rear!)

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I have found that the armature is loose from the main shaft on new dryer, new motor fixed it.

 



wtf... font shrinkage?

Edited by Samurai Appliance Repair Man
Fixed the font shrinkage :)
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Loose armature=60 hertz hum! In the business we call that "pull in"

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Whirlpool WGD4800XQ  Just thought I would update you since I am sure you lose sleep at night wondering...   ;)

 

I called the store and told them it didn't work.  The hum remains.  I was in the basement while talking to thim and the guy said he could hear it over the phone.  He assured me this is a fluke and this should not happen again and this is very rare.... and they swapped the dryer today....  Same dryer/model.....

 

.....Same noise

 

GRRRRRR #&!&!$**^!!!

 

And not only does it make the same noise, but there is a dull *thud* on each revolution ANNND... a consistant little squeak noise that does not match cadence with the revolution of the drum

 

Maybe I will try the Speed Queen that I was origianally going to get.  Just confused now.

 

 :(

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Dredging up an older topic. Anyone have a definite solution to this problem yet. Brand new dryer. 110.75102310

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I have found the old Amana style dryers to make these noises.  

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I should have came back and posted.  We had them come and get the 2nd dryer.  This time, I went back to the store and looked at a few others.  Ended up with a GE dryer.  Same money, a few more options and NO HUM!!  This one is serving us well and is whisper quiet.

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Is whirlpool playing dumb on this one? The humming resonates through the whole house and even into the neighbors house. It's been over a year since this topic was started and they are still selling these hummers. 

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