BP2750 CFM Replacement Bath Fan Motor and Blower Wheel

  • Overview
  • Specifications
  • Reviews
  • Answers
  • 50 CFM Replacement Bath Fan Motor and Blower Wheel--Compatible with:

    • Broan 662
    • Broan 668
    • Broan 678-A, B, C, D, E, F
    • Broan 688-A, B, C, D, E
    • Nautilus N678-A, B, C, D, E
    • Nautilus N688-A, B, C
  • BP27 is rated 2.8 out of 5 by 9.
    Rated 1 out of 5 by from Replacement Motor with fan unit Hums & Vibrates excessively! I purchased the Broan Model BP27 replacement fan motor kit for my bath fan from Lowe's Home Center. The installation was easy. Similar to other comments made by other customers, within seconds of turning the fan ON, it would start a continuous, very loud "humming" sound that would resonate through the fan housing into the ceiling. If you put your hand on the fan frame, you could feel serious vibration. I went so far to place some rubber padding on the motor frame before replacing it into the housing which made absolutely no difference. I returned the unit to Lowe's for exchange 2 times and now I'm on my 3rd unit. They ALL performed the same way! Now after calling Broan Tech-Support, they are sending a replacement from the factory assuming there was a bad lot of motors made. I'll wait to see if replacement number 4 works better?
    Date published: 2017-12-28
    Rated 1 out of 5 by from Starts loud buzzing after a second or two What rubbish. The motor/fan initially starts up nicely and is reasonably quiet for a second or two, but then it starts making a loud buzzing sound. Even when the motor/fan are removed from the motor plate, it still buzzes... it is apparently something in the motor. Loose laminations? Whatever the cause, this is just junk.
    Date published: 2017-02-28
    Rated 1 out of 5 by from Very noisy after 1 to 2 minutes in use When the fan is first powered on, it runs very quiet. After it has been running for 1 minute or 2, it becomes very loud. It is like running a air compressor in the bathroom. This is my second unit. The first unit, I thought it was just a defected unit and I went to store to exchange a new one. The new unit has same problem. I even noticed recently that it stopped for a few seconds, then re-start on its own.
    Date published: 2016-02-13
    Rated 4 out of 5 by from Fits many other products as well As many other sites note, fan motors are very similar across a number of brands. You do need to watch for spline length and fan type. I found this unit works with a very old, discontinued vent fan by Air-o Fan - a fan unit from the 1970's and labeled as 605 for a 600 unit. However, one required change - the fan goes CW and not CCW. Happily, this is very easy to change: just remove the 2 long screws holding the motor ends together, move the pieces so it face the opposite direction and reinstall the screws. Voila, CW. Otherwise, it fit perfectly! Agree that the air volume isn't wonderful, but it's decent and saved ripping out the ceiling of the bathroom for our discontinued fan model.
    Date published: 2015-10-15
    Rated 4 out of 5 by from Replacement for Generic Fan The motor in my powder room needed to be replaced. It was a generic build by the builder 25 years ago. Kudos to Broan for keeping the design constant. If I need a new complete build, I will go to them. Installation was easy (though I needed to get additional motor nuts (lock nuts).
    Date published: 2014-07-02
    Rated 1 out of 5 by from Very low air flow Installation and motor are great. Replacement fan blade moves very little air. Simply put toilet paper infront of grill and it is easy to test the air flow, the TP barely stays up against the grill, really, seriously.
    Date published: 2013-11-11
    Rated 3 out of 5 by from Fits but not a great fan The box at Lowes for this model (BP27) shows that it also fits Broan model #688 - A through E. As you can see from this website above Broan does not list this model. It fits and runs just like the old motor, however, I am not convinced that the fan blades (new in the box) are operating as efficiently as the original fan which is similar but has a sealed top and is a bit thicker. The shaft spline is different so the old fan blade won't fit. It does run as quiet as the original equipment. Gave it three stars as it is worth a try at only $15+/- and may work better in other Broan models. Would have liked to use the old fan blades though.
    Date published: 2013-05-19
    Rated 5 out of 5 by from bathroom vent motor/wheel The experience was very good. We found the part we wanted easily. The order came quickly & the part works great.
    Date published: 2013-03-28
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  • Is this motor considered to rotate clockwise or counterclockwise?

    Asked by: jdanelectro
    To answer my own question the rotation has to be clockwise looking at the shaft. My fan has a side discharge, to direct air by a flapper that hangs infront of discharge, rotation has to be clockwise. Flapper will not open running CCW.
    Answered by: EJL1
    Date published: 2016-04-30

    Buzzing Sound

    I just installed this replacement motor. However, the fan is not spinning and only getting buzzing sound. What can be wrong?
    Asked by: Vuong
    I had the exact same thing happen to me. Swapped the motor, got everything buttoned up, flipped the switch and nothing but a buzzing sound. Took the cover down and tried to spin the wheel (I unplugged it first). Noticed it was in a bind. I took it back down and pressed the wheel further down on the shaft to where the shaft protruded about 1/8" through the top of the wheel instead of flush like the instructions said. Put everything back, flipped the switch and voila! Works just fine now. So check the wheel to ensure it spins freely when you install it.
    Answered by: BigCountry
    Date published: 2014-04-05


    This BP27 is a replacement for a 4.5sone and a 2.5sone unit... how is that possible? What is the sone rating on this unit? Are 1sone replacement motors available?
    Asked by: BobSSS
    Thank you for your question on the model BP27 replacement motor and blower wheel. The BP27 is also the single part number of 97012038. This motor and wheel combination is used in multiple units, but may not be the original motor that supplied the original sone rating. The motor used now is a replacement that allowed us to keep these units in service and supply the 50 cfm rating. This also allows the home owner to simply replace parts instead of replacing the entire unit. The models that use this motor and wheel also use different duct sizes such as 3" or 4". These differences will affect the sound and is shown by the different sone ratings on the different models. For further questions, please contact our Technical Support department directly at 800-637-1453. Thank you.
    Answered by: BroanCustomerService
    Date published: 2016-01-27

    why is fan making a lot of noise

    Asked by: pcrupi
    Thank you for your question. There could be several causes and factors, which could be a source of noise, within a fan unit. If the unit has been installed for quite some time, I would suspect a dust build-up on the blower wheel which has caused an imbalance or the duct work may have become constricted. If this is a new installation, it could a vibration or the blower wheel could possibly be rubbing on something. For further assistance, please call our Technical Support group at 800-637-1453.
    Answered by: BroanCustomerService
    Date published: 2017-12-15

    What is the size of the motor nuts?

    I have to replace the motor nuts as well. I would have thought they came with the motor, but they don't. Maybe Broan could list the size needed with the information that came with this motor? Thanks
    Asked by: Jazz
    Thank you for your question on the model BP27 motor and blower wheel. You'll need 2 of #6-32 nuts.
    Answered by: BroanCustomerService
    Date published: 2017-11-11
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