Replace shower fan motor in a Broan model 678

There are a number of YouTube videos that show how to replace the motor assembly on a Broan bath fan. Once you have unplugged the fan and removed the motor mounting plate you will have easy access to replace the blower wheel and/or the motor assembly.
Just go to You Tube and search on Broan

Sure you can, take a look on amazon Amazon com Broan 678 Ventilation Fan and Light Combination 50 CFM and 2 5..... Have a nice day

The housing brackets is nailed to the rafter, you need to go in the attic to pry it loose.

You can buy a replacement motor assembly for that model.
http://vacuums-intercoms.centralvacuumstores.com/search?w=8663rmsa&af=type%3Aproduct&asug=&x=0&y=0

http://parts.broan-nutone.com/nutone/Shop?actn=quicksearch&searchtype=all&indextype=7&keyword=8663rmsa&Search.x=0&Search.y=0

Hi,

Here is a tip that I wrote about cleaning bathrooms fans that also addresses that issue at the end...

http://www.fixya.com/support/r6871896-broan_bathroom_fan_care_cleaning

heatman101

The replacement motor is available for that fan model. The NuTone part number is the 0696B00. It can be purchase from these sites:

http://parts.broan-nutone.com/nutone/Shop?actn=quicksearch&searchtype=all&indextype=7&keyword=qt100l&Search.x=0&Search.y=0

http://www.centralvacuumstores.com/Bath-Vent-Fan/NuTone/Motor-Assembly/0696B000-Motor-Assembly.php

http://www.ventingdirect.com/nutone-0696b000-power-unit-assy-packaged/p431404?y=16&term=0696b000&x=41

Hello,
The fan/motor part of the Broan fan is replaceable. They are actually very simple to take out and install a new part.

The part can be easily purchase here...

http://parts.broan-nutone.com/broan/Shop

Heatman101

Does it start before the mark as you turn it if so replace the switch. power off first and check with a meter.

I ran into the same problem, Lowe's carries Broan exhaust vents. They had both a replacement motor for all generations of 678 fans for $18, and they also had the latest generation of the complete unit for $40. I bought the complete unit, which included the fan I needed. Just unbolted it from the new bracket and bolted it to the old one. The new light housing, trim piece, and lens also interchanged. The existing one was old and yellowed, so this made for a huge improvement. All done from in the living space as well.

You'll be able to access the motor to service it and the wiring junction box from inside the bathroom. Please rate this answer if it was at all helpful.