Question about Broan-NuTone CV450 Central Bagged Central System Vacuum

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My nutone cv556 wont shut off

Hi my Broan nutone cv556 wont shut off unless i unplug it from the electrical source. Even when i disconnect the low voltage wiring on the unit that goes to the inlets, it still dosn't shut off. Also the on/off switch on the unit does nothing.

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  • Anonymous Oct 14, 2008

    My unit will not shut off unless I unplug it form the wall I

  • gumbyrun Dec 30, 2008

    I have the same problem. I also disconnected the low voltage wires to the outlets and it will not turn off. Mine is a cv-450. Also when I turn the switch on te unit on and off it doesn't make a difference.

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It sounds like the relay is bad. This website has a pretty good trouble shooting page.

https://www.centralvacuumstores.com/cvs/trouble_help.php#wont_turn_on

Posted on Jan 20, 2009

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How do I clean out nutone cv556 filter bag?


There are 3 options: 1) Use another vacuum like a shop vac to clean the filter bag while in place. 2) Wrap a trash bag around the bottom of the canister with the dirt can removed. Tighten the trash bag around the metal can and smack or shake the filter bag. This will prevent dust from escaping into the air and on you. 3) Grab the filter bag towards the top where it locks into the can. Pull the filter bag towards the center of the can to fold it into a C-shape. This can be hard to do, so do not be afraid to pull. Once folded into the C-shape, the bag should come out easily. Take the bag outside to shake off any debris. To put back in place, use the C-shape method again, and fold out to form a full circle. DO NOT wash the bags out with water.

Please visit our website if you need a replacement part or if you have more questions. Or give us a call at 1-800-533-3249

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May 22, 2014 | Broan-NuTone CV556 Cyclonic Bagless...

1 Answer

NuTone CV750 Central Vacuum won't shut off. The on/off switch on side of unit has no effect. Did continuity test on switch, it tests ok. I've disconnected the low voltage wiring at the side of unit,...


I will assume that you disconnected the switch from the circuit when you did the continuity test -- that is really important.
If so, then i think that the relay inside the top of the unit is stuck on, or the low voltage wires (inside the top) going to the relay are shorted together.
You can easily remove the top after removing 3 (or 4) screws from the upper side of the unit. Be careful to align the vents in the top with the cooling ducts from the motors when replacing the top.

Aug 31, 2010 | Broan-NuTone CV750 Central Vacuum

1 Answer

Nutone CV353 does not shut off, think it is the relay board


You probably have a stuck relay. You can try tapping with medium force next to where the low voltage wires are attached to the unit using the handle end of a hammer. Even if this works it's time to replace the circuit board. Take the unit to a local vacuum repair center for service.

Jun 26, 2010 | Broan-NuTone CV353 Central Vacuum

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

How to empty the bag of the cv556


It actually isn't a bag it is filter. The stuff that you feel inside are weights. The filter will get sucked up into the vacuum when it is on and then the weights are supposed to help it drop and shake off. It is a permanent filter and I would not recommend changing. It is a pain to replace and pretty pricey. I would expect at least $65.00. The best thing to do is to vacuum it off with a shopvac or another vacuum with a hose.

Oct 20, 2009 | Broan-NuTone CV556 Cyclonic Bagless...

1 Answer

Nutone CV556 Vaccuum Cleaner -Continuously running


Start with this. Unplug the vac to shut off, then disconnect the low voltage wiring at the vac.Plug the vac back in. If the vac still runs you have an internal short on the relay or wiring inside the vac.
If the vac stops then the vac and final wiring is OK and the problem is in the wiring in the house.
Have you removed any inlets for painting or had any renos done or pictures hung. If so undo what you did last. If inlets were disturbed remove them and look for low voltage vac wires touching metal backing plates in the wall or touching the inlet mounting screws.
If you have done a reno or hung pictures you may have pierece the wire for the vac creating a low voltage short which will keep the vac running until removed. I have seen this happen with freshly installed 1/4 round molding along a baseboard

Sep 07, 2009 | Broan-NuTone CV556 Cyclonic Bagless...

1 Answer

The vacuum is always on unless i unplug it


sounds like your controll relay went bad in the main unit its an easy repair but i would still have a reputable vacuum shop do it.

May 14, 2009 | Broan-NuTone CV554 Cyclonic Bagless...

2 Answers

NuTone Central vac won't turn off


If the central vacuum tank will not turn OFF even with the switch in the “OFF” position, then the low-voltage wires should be disconnected from the tank. If the tank continues to run and still will not turn off, then most likely the relay inside is defective (but it could be a defective and/or shorted ON/OFF switch). If with the low-voltage wires disconnected the tank is able to then be turned off with the switch, then there is a short in the low-voltage wires or a hose is plugged into an inlet somewhere. ~ TTURAMBAR

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1 Answer

Motor won't shut off on central vacuum


Your relay is bad. This is very easy to change out yourself. There are several websites that sell this part online. Some websites offer free tech support.

Mar 01, 2009 | Broan-NuTone CV350 Performance Bagged...

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