Question about Broan-NuTone CV350 Central Vacuum

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Vacuum won't turn off

When I pull out the hose from the receptacle, the vacuum won't shut off. I can't even shut it off on the master on the unit. I have to unplug it. All receptacles are closed and seem clean. Is there a switch inside the hose hole that turns off the vac?

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This is a common problem i see it weekly. You just need to replace the relay in the tank. have an electrician or vacuum tech do it so its done correctly without causing more problems.

Posted on Jul 26, 2009

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There is a relay back on the master unit. When the hose is plugged into the inlet the metal on the coupling completes the electrical circuit to the relay. As long as there wasn't any conductive surface left across any of the contacts in any of the inlets, the relay is hung up. I never heard of that happening but it is possible.

Posted on May 28, 2009

  • Steve Eide
    Steve Eide Jan 05, 2013

    Happened to me too. Attempting to fix now.

  • Steve Eide
    Steve Eide Jan 05, 2013

    I've got the same problem and have already checked the wiring. Trying to fix now.

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