20 Most Recent Broan-NuTone N-LS80L White Polymeric- NuTone Combination Light Fan Exhaust Fan Questions & Answers

If you remove the motor, which usually isn't to difficult to do. I would recommend plugging it in to one of your electrical outlets to check it. There is a possibility that the wiring is messed up or the plug in the housing went bad. If the motor doesn't work you need a new motor if it does work then you could try replacing the plug in the housing. All these parts are still available.
Here is a motor finder for NuTone motors:
http://www.centralvacuumstores.com/nutone/fan-motor-main.php
Here is the manufacturer you can get parts from them:
http://nutone.com/

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.

11-1-12Thanks for link to manual.Solution might take more response for full clarity, and you seem a good electrician. I have numbered two questions that may be unimportant.Add a comment, response after 5 pm CSTHere is illustration showing Black Hot and White Neutral in attic junction box, as you described. With black-red-blue wires connected as shown in Broan manual. And each device connected to White neutral wire in junction box.http://waterheatertimer.org/images/Triple-fan-light-night-light.jpgYou have access to attic, and can drop another cable down wall into switch box. This will give necessary total 4 wires between switch and Broanhttp://waterheatertimer.org/OWB1.htmlKey start point: Junction box in attic has the Black Hot wire and White neutral coming from circuit breaker box.This cable powers the junction box.There are 3 cables in junction box, each cable with black and white.Cable from breaker box with Hot and Neutral. Cable going to light switch.Another cable jumps power to next box in the circuit, and will be reconnected when finished, black-to-black white-to-whiteOld light switch in wall was single pole.1) How many cables are inside switch box? Just one cable from attic with black and white wire?2) 3-way switch is the wrong switch, unless you mean 3-pole triple switch with 3 screw terminals on one side of device?Here is another link that shows wiring choices if you decide to use 3 separate switches (or timers or occupancy sensor to turn on night light) instead of triple switch: Install triple box.http://waterheatertimer.org/How-to-wire-switches.html#4-f If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7