Broan-NuTone CV750 Central Vacuum

How to Identify and Fix Common Vacuum Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced Vacuum Technicians :

The most likely cause is incorrect wiring to your wall valve inlets. Disengage one of the system wires on the front of your power unit and if the system shuts down then you need to verify the wiring to your wall valve inlets is correct. If the problem persists call Broan-NuTone Technical Support at 888-336-6151.
UNITS THAT EMPTY FROM THE TOP: The motors are on the bottom of the vacuum unit. Remove the unit from the wall, turn it upside down, and open the bottom or bottom section to reveal the motor. Each motor has two or three wires that may run to other wires, relay, or mini-breaker.
If the motor still has some life in it, it will start, but if it is going bad, it will only work for 10-15 minutes or less. If it doesn`t start at all, it is obviously bad. Sometimes slapping the motor or vacuum unit will jar the motor and get it to work again for a few minutes. Intermittent motors should be replaced.
The most common problem with a vacuum cleaner is also the easiest to remedy: clogs in the hose or attachments. Also the electrical cord, motor, switch, fan, brushes, and motor bearings can all need repair or replacement. The drive belt may need replacing; and the attachments, hoses, and filters may need unclogging.
Loose connections will cause your vacuum cleaner to lose suction. Make sure that the dust container, the hose, the tube and the brush are all attached properly. If the problem continues, your vacuum cleaner might have a technical problem. If you suspect this to be the case, contact an authorised service agent.
the vacuum system may be dirty, the pumping line may be restricted or too small in diameter, the pump may be dirty or with too little capacity, the pumping speed may be restricted due to other causes.
If the motor still has some life in it, it will start, but if it is going bad, it will only work for 10-15 minutes or less. If it doesn`t start at all, it is obviously bad. Sometimes slapping the motor or vacuum unit will jar the motor and get it to work again for a few minutes. Intermittent motors should be replaced.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Bad Motor I have purchased two of the Kenmore direct drive beltless systems with Progressive systems. The first died after a year, the vacuum motor start making a grinding noies. I pulled the side HEPA filter and could see a fine coating of graphite like dust. Took it to a vacuum repair shop. They said the brushes were going and thus the motor was shot. I liked the vacuum and bought a second, 1 year later the motor is making a slight noise that and removing the HEPA filter I find a slight metall
ANSWER : That dust is from the carbon brushes on the motor. You may need to check them, and also clean out the motor compartment. A slight noise could be a motor bearing starting to go. Does the smell like rubber or electrical. If rubber, then the belt has stretched and needs to replaced. If electrical, then something is causing the motor to run hot, like a clogged filter, or it could be a motor going bad.

My home has a central vacuum system hook-up but no vacuum installed. My friend upgraded his central system and gave me his Eureka Mega Boss central vacuum system and the accessories, including the pow
ANSWER : The power head requires 120 Volts. Some hoses have a receptacle in the handle for the power head plug, and the hose has a cord at the wall inlet end that plugs into a receptacle. Some hoses have a plug at the wall inlet end that plugs into a 120Volt receptacle built into the inlet. The hose plugs into this receptacle when you push the hose into the inlet. The power for this built-in receptacle is wired with line voltage when the system is installed.

Motor My vacuum cut out as I was using it. After some experimenting I found that the circuit reset had gone off. When I tried a second time while near the motor , there was a flash and again the motor shut off. At this time I am guessing that the motor is faulty. The central vacuuming is approximately 12 years old.
ANSWER : If it tripped the reset again, I would probably agree with you. Check out centralvacuum.com for another motor. They aren’t the cheapest, but they have excellent support. Good Luck!!

Dirt devil vacuum cleaner–trouble vacuuming dirt and pet hair on carpeting –is the problem with the spinning brush which contacts the floor,  not contacting the carpeting??  I thought (when I bought this vacuum) that the aforementioned brush was adjustable to various heights of carpeting.  Sometimes, it seems like nothing is being vacuumed up –unless I have just put a new bag on the vacuum… Do I need or can I replace the spinning brush on the bottom of the vacuum so it kicks up and vacuums
ANSWER : Try replacing the belt. Rubber belts stretch out after about a year.

I purchased a Eureka C4910 last year and have a question that I am hoping you can answer.

There are two motor actions with this vacuum, 1) the vacuum suction, and 2) the beater bar. The action of the beater bar is that motor is supposed to automatically shut off when the handle is in the complete vertical position assuming the vacuum is stationary, but then turn on when the handle is tilted toward the floor, assuming the vacuum is moving back and forth.

The beater bar motor turn-on mechan

ANSWER : Good day!

Normally when the motor is easily moved back and forth means that it have a proper lubrication,proper alignment and no clogs.

When the motor and the belt is OK the problem could be on electrical wiring and switch.

If found electrical switch burned out you need to replaced it because when the switch is burn the contact of that switch is open even you turn it ON.that’s why the motor is not function because the voltage is not pass through the circuit because of open switch.You need to replaced it.
And check some fuses if any and other burned electrical wire.Replaced it also.

Thank you and don’t forget to rate my answer.

I purchased a brand new Eureka Pet vacuum, sorry don’t know exact name but it the one that has the self cleaning duster on it. Last night I used the vacuum on my carpet, it was working fine until I accidently sucked up the corner of a scarf that was hanging off a couch. I shut the vacuum off, pulled out the scarf and and resumed vacuuming. Much to my dismay the suction on the vacuum had ceased. Can you tell me if there is a reset button on the vacuum? The vacuum does not appear to be damage
ANSWER : If the motor is running, there should be suction. Possible problems depend on whether it’s a canister or upright and are:
.A clog in the hose, UR or canister. Detach hose. Drop small coin in one end and lift hose causing it to roll out the other. If it does, no clog in hose. Drop same coin into hose opening on power head. If it rolls out, no clog in PN.
.Broken fan blades, UR. Needs to be taken to shop for repair/replacement.
.
.A reset button is for use if the motor isn’t running, so won’t have anything to do with the suction.

Nutone model cv-350 vacuum motor will not shut off. I have to unplug system in garage. I disconnected wire to house vacuum inlets and motor is still running. There must be a reset on the motor. I have turned the external switch on and off and still no help.
ANSWER : Mine is the same, and it is the relay welding itself closed. The relay is switched by the low-voltage wiring that connects to the vacuum outlets, and it switches the motor on and off. Mine was welded in the energized position. I have cleaned and filed the contacts on the relay, and that solved the problem for about a week. I suspect the relay contacts were plated, or a worn motor is drawing a little too much current (it is several decades old at this point).

Central vacuum Hello, my central vacuum motor just clicks when you insert the hose into the receptacle. Is there anything I can do besides get a new motor or unit?
ANSWER : If the central vacuum is clicking that means that the circuit breaker is working and trying to get the motor to run but the motor is not functioning. This means it’s time for either a new motor or a new unit. Unfortunately there’s really no way around that. You might want to replace the entire system though because you have to think about where your money is best spent, putting a bandaid on your old machine or investing in a new machine that will last you up to 20 years.