Question about Broan-NuTone CV353 Central Vacuum

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Nutone CV-750 When I am using it, it will shut itself off and on... What can I do?

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You need to determine if this is a problem with the hose or the unit. I would recommend plugging my hose in the wall sideways. This should make your central vacuum run continuously. If the unit doesn't cut on and off it is the hose. If it still cuts on and off it is probably the relay.

Posted on Jan 20, 2009

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SOURCE: I have a nutone CV-750,

It sounds like you could have one of two problems. I would guess either a short in your house, or a bad relay. If you plug you hose in sideways it will bypass the low voltage wire in the hose. If the unit doesn't shut on and off then you have a short and need a new hose. If the unit continues to cut on and off then you probably need a new relay. The relay is really easy to change out yourself and there are places to buy online.

Posted on Feb 13, 2009

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Posted on Jan 02, 2017

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A Nutone CV-450 System with inlet nozzle switch issues


You are suffering a connection problem of the hose end fitting to the wall outlet. Either the hose is not aligned with the two pins in the wall outlet, or the pins in the outlet are dirty and not making good connection to the hose end fittting.

Jan 01, 2010 | Broan-NuTone CV450 Central Bagged Central...

1 Answer

CV-353 will only go off by unplugging. Electrical disconnected from ports to unit. Checked push pins on all ports and they are moving in and out.


http://www.centralvacuumstores.com/cvs/trouble_help.php#runs_continuously

Here is a link to find a local dealer:
http://dealer.nutone.com/DealerLocator.aspx?unit_id=002&cata_id=8

Dec 23, 2009 | Broan-NuTone CV353 Central Vacuum

1 Answer

Have a nutone CV-450. Suction is gone at the


The first thing to do is to disconnect the pipe coming into the unit. If there is suction there than you probably have a break in the line. If there is no suction when you disconnect the pipe coming into the unit than it is most likely the motor gasket. This gasket can sometimes get sucked into the motor causing problems. Remove the lid to the central vacuum, than disconnect the motor, you should be able to tell if maybe the gasket has been off center or if it has been sucked up in the motor.

Dec 13, 2009 | Broan-NuTone CV450 Central Bagged Central...

2 Answers

I need a relay board for a Nutone CV 450 12.6 amp dual motor vacumn unit. Where can I locate one? Part #??? Unit will run by itself, then shut off. Unit wll not run at all. It has a mind of its own....


Unfortunately I don't have a part number for you, but you can call this number 1800.322.2965. Tell them you need a new relay board for your system and they'll be able to help you. They cost around 99$. for anything else you might need, go to www.thinkvacuums.com

Sep 01, 2009 | Broan-NuTone CV450 Central Bagged Central...

1 Answer

I have a nutone CV-750, and when I am using it, it will shut off and on.. What can I do?


It sounds like you could have one of two problems. I would guess either a short in your house, or a bad relay. If you plug you hose in sideways it will bypass the low voltage wire in the hose. If the unit doesn't shut on and off then you have a short and need a new hose. If the unit continues to cut on and off then you probably need a new relay. The relay is really easy to change out yourself and there are places to buy online.

Jan 06, 2009 | Broan-NuTone CV353 Central Vacuum

1 Answer

Problems with 353 nutone


if its an older unit or it got heavy use it could be the motor they tend to sputter as there going out, as it rotates the electricity hits a burnt spot inside the motor and shuts itself off can you turn it on manually? they usually put a swithc on the tank itself if the problem doesnt occur when you switch it then it could be the hose itself normally they control the off/on use a meter to check the continuity beteen the two copper plates that are on the end of the hose ( the wall end )

Sep 16, 2008 | Broan-NuTone VX475 Bagged Central System...

2 Answers

Nutone CV 450


If the top comes off, it will be by the motor and exhaust. Just replace it with the new one, make sure you don't mix up any wires. Also unplug it from the AC first.

Jun 22, 2008 | Broan-NuTone CV450 Central Bagged Central...

2 Answers

I have a 3 year old NuTone CV 353W central vac system and recently the switch on the hose handle does not turn the system on from any outlet in the house. I have to plug the hose into the outlet and then...


http://geeksquad.fixya.com/ThreadView.aspx?prdid=0&thid=567634
Generic problem for all Vacuums
I have a 3 year
posted by patfitz on May 03, 2008
I have a 3 year old NuTone CV 353W central vac system and recently the switch on the hose handle does not turn the system on from any outlet in the house. I have to plug the hose into the outlet and then turn the unit on from the switch on the canister. Any help would be greatly appreciated. Thanks

Hello,
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. There are a couple of things that come to mind, 1st. you may have a bad switch in the hose and in most cases that can be repaired – if not you would have to purchase a new vacuum hose. 2nd. You may have a bad inlet valve in your hose and most of them are low volt of which would only cost less than $10.00 and can be replaced yourself unless you have what they call a SuperValve of which has 2 low volt wires and then it is wired to your home electricity and that should be replaced by an licensed electrician. It is a low volt and high volt inlet.

#3. the last thing you may check id that you may have a bad relay in the canister itself. Because you should be able to turn on the Central Vac with the switch on the hose and everything should work just fine . feel free to contact your local vacuum cleaner dealer in your area of call the Nutone Factory cust serv line for further assistance. So if you need further assistance, please feel free to contact your local vacuum cleaner dealer in your area or in the yellow pages, or contact the factory phone number or website to further assist you with your questions.
http://nutone.com/ Customer Service
Nutone Inc.
9825 Kenwood Road
Suite #301
Cincinnati, OH 45242
Customer Service 1-888-336-3948
Technical Support 1-888-336-6151
Thanks, Don the Vac Man
Go Ahead. Use Us.

May 03, 2008 | Broan-NuTone CV450 Central Bagged Central...

1 Answer

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...


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).

Apr 21, 2008 | Vacuums

1 Answer

Low voltage wiring


Probably just didn't wire the l/v side of the relay properly. Or forgot to plug the leads from the outlets back in to the vac after you got it all hooked back up. Folks do it to me all the time and then make like it's my fault! Ha ha.

Jump the l/v contacts inside the CV. If it goes: trace outward toward the outlets to see if something shook loose while it was apart. If you can't jump the l/v with a plier/screwdriver at the CV or even inside it, you have an issue on the board (either how you've connected to it or it's defective itself). The prob is that there's dozens of diff board configs, plus the relays and transformers weren't together on the same board in the old days. If you've got one of these models with a massive transformer separate from the relays get out the test leads and make sure you've got adequate voltage coming out of her to power the relay coil.

Aug 26, 2007 | Broan-NuTone CV750 Central Vacuum

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