Having problems with your Broan-NuTone CV350 Central Vacuum ?

Switches will not turn off unit. model #cv450w


Answers :

If the switches on the hose will not turn off the vac you have a short in the wiring of the vac pipe system or a defective relay on the circuit board. Plug the vac in again without the hose and disconnect the thin low voltage wiring were it plugs into or screws onto the vac.
If the vac continues to run once disconnected from the low voltage circuit you have a defective relay in the vac itself. Some are circuit board mounted , others freestanding. To avoid a service call you can take the tank off the wall and take it to a pro shop or remove the top hosing if you are confident and check out the relay for a replacement part.
If the vac stops your issue is in the house. Has any painting been done or any inlets removed lately.. check that area first for a short at the inlet. Go back to any and all inlets and remove them one at a time checking the mounting screws and backing plates for loose wiring which is touching either the metal inner wall plate in the wall or a common screw . Test the vac as you go.
If this does not help, you will need to examine the wiring in the house , running along the pipe. Again if anything has been disturbed recently, near the vac, or near any piping that would be your first suspect area.
Post back to advise.
Repair Help & Product Troubleshooting for Broan-NuTone CV350 Central Vacuum

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Switches will not turn off unit. model #cv450w


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