Nutone VX550 suction shuts off during normal use

see if the drive belt is attached or broken.

heat sensor on the motor its bad thats why it shuts off or your relay module is bad

yes that unit has 2 sensors 1 on the motor and 1 on the relay board 1 of them is bad which is making the vacuum shut its like a heat sensors its malfuctioning it shuts the unit down

The VX series NuTone's have had some problems but NuTone is taking care of them as long as it is under warranty. You can contact NuTone at 1-888-336-6151 or whoever you purchased the unit from and you will most likely get a new unit. There are no parts available for the VX units so whenever there is a problem NuTone has been sending new units out.

Heven't fixed it yet, but I've pulled the motor to see what the specific issue is. As soon as I have the problem isolated and a solution, if possible, I'll post it here. I will have to contact Nutone Monday and see what they will do. If nothing, I'll sort it myself.

Tiny

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.

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 )

It's a known problem. I bought my vx550 last year in July and it stopped working this year in May. On for 5 minutes, shut down, can't run for a few hours, runs for another five minutes, etc. I called the Nutone customer service department and they exchanged the unit for a new one, cross shipped, via UPS. Mine was still under warranty though. It has to do with some defective thermostat or controller in the electronics of the vacuum.

Good luck

http://www.geeksquad.fixya.com/ThreadView.aspx?prdid=0&thid=539794
Generic problem for all Vacuums
No suction on lower level
Posted by phil55555 on Apr 23, 2008
Nutone central vac
no suction on lower level second floor fine
ran fish tape but it does not go all the way through,
do i need to take pipe out.

Hello,
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure.
Not @ first, try to get a central vacuum cuff and go to each and every inlet / outlet down the basement and put the cuff in the inlet – the central vac should come on and possibly might unclog the pipe, 2nd, try taking another canister type vacuum while the central vac is running and open the inlet door and try to “pull apart the clog in the pipe” – this does work upon occasion if not you can try a plumbers snake – but be careful because the walls of the pvc pipe are thin wall and you don’t want to poke a hole in the pipe or other wise you will have to replace the pipe. The absolute last resort should be to replace the pipe if all other do not work. Feel free to contact your local vacuum dealer in your area or in the yellow pages , or contact the factory @ the phone #’s listed below:
http://nutone.com --- Customer Service
NuTone Inc.
9825 Kenwood Road Suite 301
Cincinnati, OH 45242
In U.S.A. call:
1-888-336-3948 for Customer Service
1-888-336-6151 for Technical Support

In Canada call: 1-888-882-7626
Thanks, Don – The Vac Man
Go Ahead. Use Us.

The vacuum is defective, if you call Nutone and tell them the probelm, they will replace it for FREE, no charge to you. CALL 888-336-6151, that is the Nutone Tech Suport line.