I have three Broan ventilation fan/light combo units installed in my home [one in each of three bathrooms]. All are model 678-F/678 F-F with room-only access, and all appear to have been installed by the homebuilder in 2001 [I'm not the original owner].
The light in the master bathroom's unit continues to operate, but the motor recently stopped spinning and started emitting a troublesome drone when switched "on" [we're leaving it off until it's repaired]. I'd prefer to upgrade to something with more than 50 cfm and dimensions identical to those of the current unit's housing, however, after reading several other questions and answers on the website, I've gleaned that it would not be possible to install any of the compatible, more-powerful units from the room [attic-access isn't possible]. Therefore, I assume, my only choice is to repair this one.
My questions are as follows:
1.) As I've stated, attic access isn't an option in my case. Is it possible to replace the motor in my Broan light/fan combo model 678-F/678 F-F from the room by removing the grill, light bulb and light reflector?
2.) The sticker inside the housing of my unit identifies the existing motor assembly as part number 97012040, but no part with that number exists on the Broan "Shop-For-Parts" website. Other consumers with model 678-F/678 F-F have been advised by Broan Customer Service that the appropriate replacement motor assembly is part number 97012028 [which I found quickly on the Broan parts website]. Is 97012028 the correct replacement part for my model?
3.) Assuming part no. 97012028 is correct, can you identify any other replacement motors capable of 60 cfm or higher that are compatible with my Broan exhaust fan/light combo model 678-F/678 F-F?
4.) Regardless of cfm, are there any other Broan motor(s) [such as part number 97012038] that qualify as replacement motors for model 678-F/678 F-F?
Thank you for your assistance.