20 Most Recent Broan-NuTone Nutone Aluminum Dome power Attic Ventilator for Roofs up to 2200sq.ft. with PSC Motor - RF68HRPSC Fan Questions & Answers

Did you check to see if the motor was warm or made a noise?

Return for replacement or see if you can fix.

I'm looking for the replacement motor for Nutone 668N-part #53709000- it is discontinued. Central vacuum has a replacement buyt is out of stock. There is no new unit that fits the old opening. I have no ascess to the attic. Any ideas?

The motor is usually not repairable. You can sometimes purchase the motor and fan separate but that is about it. Here is a link to a blog about replacing motors.
http://nutoneproducts.blogspot.com/2009/05/broan-bath-fan-motor-replacement.html

faulty thermostat switch

Pull the cover from each side directly straight down. The cover will come down about 2 inches. Reach up on either side and squeeze together the spring to release it from the housing. The cover will swing down. Replace bulb. Squeeze the spring back together and initiate it into the housing. The last step is to push vertically the cover back up in to the housing.

Try adjusting the fan lower on motor shaft failing that buy another unit and change motor and return broken motor

It is cheaper to get a new unit than to attempt a repair.

try hoovering it get the dirt out and some wd40

Hi, parts can be found on amazon, here: Amazon com nutone qt 80 also new one if you want to buy. I hope this was helpful. Cheers

Go to manufacturers site on line. This should have the instructions, and nearest supplier.

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

The start capacitor for the fan motor is defective.