Question about Broan-NuTone CV353 Central Vacuum

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

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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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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.

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1 Answer

NuTone central vacuum won't shut off


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

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

Dec 30, 2009 | Broan-NuTone CV353 Central Vacuum

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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...

1 Answer

CV 570 Relay not working, need a replacement. OMRON G7L-1A-TUBJ-C


There' s not much you can do if the relay goes. You just have to replace it. Are you positive that it is the relay?

Nov 30, 2009 | Broan-NuTone CV570 Central Bagless 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...

2 Answers

Nutone central vacuum leaks brown liquid


Dear lord, that is the most absurd thing I've ever heard. Who installed the Vac and DW or were they both in the home before your time?

Normally, if liquid drips out of a CV outlet it's because it was sucked up during vacuuming. However, if your vacuum runs or has suction at the outlets due to the dishwasher running, you have a low voltage gap being bridged by either the dishwasher's wiring or by liquid leaking from it onto the CV wiring somewhere.

Bottom line, you have MAJOR issues inside your home with one or both of the systems, and if there's liquid, there's a dishwasher to be worried about! Look below it for leaks into the basement/lower floor; follow the plumbing (especially the drain waste runs) and figure out where the damage is before your house suffers the lot.

Jul 12, 2009 | Broan-NuTone Vacuums

1 Answer

Nutone CV-750


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.

Jan 06, 2009 | Broan-NuTone CV353 Central Vacuum

2 Answers

Broken Nutone central vacuum unit


most of those systems are plumbed with PVC, but some do use flex throughout the home...
If yours is PVC, visit your nutone dealer and get a new outlet/elbow.
Trim the old elbow off with a drywall saw or other small saw (if you have a sawsall, that is fine) and glue the new one in
if it is flex tubing, it's easier; the elbow threads on. just be sure to hold the tubing so it doesn't drop down,

Jan 02, 2009 | Broan-NuTone CV353 Central Vacuum

2 Answers

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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...

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