Question about Broan-NuTone N-QT9093WH Combination Heater Heater Kitchen Hood

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Should I buy a new exhaust fan or try to fix old one?

The fan motor is very loud in this unit. We bought the house six months ago and it seems to be getting worse. We have the same one in the kids' bathroom so I know it isn't supposed to sound this bad. Can I replace just the fan/vent motor or should I just buy a new one? I found one for under $250 in white, ours has the brass ring, but I don't really care about that. I'm thinking if I do replace it I should buy the same one though so I don't need to cut a new whole or do repairs. Any thoughts? I did take off the exterior and look for vibrations, but it seems to be in there sturdy.

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  • Anonymous Jun 14, 2018

    they sell motors for it
    the manual for this vent is clear as day
    what the fan motor p/n is.
    if its blocked or dirty clean the fan
    a fan with junk on one side is imbalanced and will make noise
    a fan blade,,missing cracked or bent will make noise. replace it.
    the motor can be bad. and make noise.

    the vent on top can be blocked making the fan be overloaded and makes noise, clean that.


    here we go, a simple search.
    https://duckduckgo.com/?q=N-QT9093WH++%2...


    no lack of fans sold ever.
    buy one put it in, its super easy job.

    in almost every case, no need ever to rip out the whole fan assembly, and pay $300 for the fan and $100 labor.
    just unplug it , unscrew it and replace it.

  • Anonymous Jun 14, 2018

    with the blade off, them motor is $60
    the blade is.$13 whole bucks.
    if the blade is not broken buy just a motor.
    (it's just a fan)

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  • 37 Answers

If the air flow in the duct is restricted, that can cause excess noise also.

Posted on Jan 30, 2009

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Posted on Jan 02, 2017

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1 Answer

NuTone LS100 fan is squiling when it runs. Spinning the fan blade by hand when it isn't running doesn't make any noise. Am I correct in thinking that the motor needs to be replaced?


Sounds like it may actually be the bushing pack inside if the motor. Spinning the blade by hand is not going to spin it fast enough to hear the problem. If the unit is new, I would recommend returning it for exchange of a new unit. If it more than 1yr old, it's out of warranty and will be cheaper to just replace it rather than repairing it.


For less than $100 you can buy a newer, more efficient model. Depending on the size of the room is how should judge what unit to buy. An under sized unit will not pretty much nothing, except make noise and remove some of the steam. Remember to buy a fan with the lowest SONE rating as it will have the highest quality motor housing and best air removal.


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Yes and maybe.
If you open unit, usually fan motor is plugged in, and motor is removable with bolts.
The problem is finding new fan that fits same housing without spot-welding and drilling.
I did google image search for "replacement vent fan motors" and results show choices.
For example Nutone:
http://nutoneproducts.typepad.com/nutone-products/nutone-bath-fans/page/2/
If you can locate same brand vent at local box store, you can use parts from new one to repair old one without project of replacing fan housing.

20 years ago, motors went to electric repair shop and they rewound the motor.
But today, motors are landfilled or shipped overseas for recycling.
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Add a comment for more free help.
Also take advantage of fixya expert assistance live.
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Fixya is always less expensive than a service call.

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You probably can't get the existing mechanical timer to operate any quietier, since it's old and likely starting to wear out. You can either swap the timer out for a new automatic digital timer, or install a standard single pole switch in its' place.

I believe the code you refer to regarding the fan having to be wired onto a timer switch was a local requirement from many years ago.

Some local jurisdictions have impossed more stringent requirements, but frankly, having an exhaust fan is normally a good idea. If the fan is vented into the attic space, it can cause some serious problems in cold weather with condesation of the warm, moist exhaust air.

Building Code requires that bath fans be piped/vented to the outside of the house and not into the attic space.

There are newer preset timer switches that will turn on the exhaust fan for a fixed amount of time, based on which button you push. These are great as they will run the fan long enough to remove condensation from showers, etc.

If you're going to replace the timer, disconnect or turn off the breaker or power to the switch. Then simply install a new timer or switch by connecting the black supply wire to the bottom of the single pole switch, or to one of the black leads of the timer. Then connect the black wire going to the fan to the top screw on the single pole switch, or the other lead on the new timer. The white (neutral) wires should already be connected with a wire nut inside the box. Connect the ground wire to the ground wire in the box and if the switch box is metal, attach the ground wire to the box with a green grounding screw too.

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