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Re: Old Nutone central vac system turned itself on and...
If your unit normally turns on when you open the flap on the wall inlets then you should check each inlet for a switch or a button, sometimes those buttons can get loose and fall into the wall making the unit stay on. if your unit normally turns on when you plug the hose into the inlet then it would probably be a relay usually on the main tank itself try locating them and gently tapping on them with the rubber end of a screwdriver to see if you can un-stick them.
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I've gone through 3 vx475 vac in the past 7 yrs. Last one was sent to me in Apr 2010. Just yesterday, once again, my vac just quit. Green power light is on but no other sign of anything. Had a burning smell when vac quit, like motor just fried. Called Nutone again and they can't imagine whats going on but will send out another vac free and was told to throw out old one. They said dust may get into the motor and cause it to quit. These vacs aren't cheap, can't imagine that its so simple to just call up and have a brand new one sent to me. I've asked if they are rebuilt units and was told no. So my advise to you, if you haven't already, is to simply call them up w/model and serial # and they shouldn't give you any prob. good luck.
Some units have an on/off switch on the power unit itself. Check to make sure that is not turned on. Unplug your power unit and remove the 2 low voltage wires (not the power cord itself) . The low voltage wires start at the unit and run throught your home and attach to each hose inlet. They are usually attached to the unit by simple wire terminals or wire capped to small wires coming out. Just unlug the terminals or unscrew the wire caps and pull the connections apart. Plug your machine back in. If it still comes on the problem is the relay or circuit board/switch/ relay assembly inside the unit. If it doesn't come on with the low voltage wires unattached then you may have two wires touching somewhere in the low voltage wiring.
You have a defective internal relay on the vac. Check for warranty coverage as this is a common occurrence on these big box store units. If beyond warranty the relay should be a straight forward unit, miniature circuit board type plug in device. Find a Broan Nutone service center or take to vac pro shop for parts.
Disconnect the thin low voltage wiring between the vac and the rest of the house. If the vac continues to run you have a defective relay in the vac motor housing. If the vac stops you have a short in the wiring in the house, likely behind an inlet in the wall. If any inlets have been disturbed for painting or renos lately that would be the first spot to look in the house for a problem. Look for wires behind the inlet valve which are touching against each other or a mounting screw or against a metal mounting plate behind the inlet. Start at the last inlet used. Be careful not to loose the spring under the screws where the wiring attaches to the inlets
Detach the vac itself from low voltage thin wiring leading to the house. With the vac plugged into power, try the manual switch and then try shorting across the low voltage exterior terminals with a rubber gripped set of pliers. If you can hear a clicking inside, this is the vac's relay trying to start the motor. If the vac is more than 5 years old , or used more than 2 hours a week, you may need new carbon brushes, or a motor overhaul or replacement depending on wear. Carbon brushes are specific to the motor model # inside the vac, most often an AMTEK Lamb motor. If you need brushes, the motors comutator should also be inspected for excess,wear, like gap ing between its conatct segments and "apple core" shaped wear . You you have a meter and can test for continuity across the motor leads, do so and post back.
If you don't have a meter, you will likely want to lift the vac off the wall after these checks and take to a repair shop, saving $$$$ for a house call...
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
http://geeksquad.fixya.com/ThreadView.aspx?prdid=0&thid=567634 Generic problem for all Vacuums I have a 3 year posted by patfitz on May 03, 2008 I have a 3 year old NuTone CV 353W central vac system and recently the switch on the hose handle does not turn the system on from any outlet in the house. I have to plug the hose into the outlet and then turn the unit on from the switch on the canister. Any help would be greatly appreciated. Thanks Hello, I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. There are a couple of things that come to mind, 1st. you may have a bad switch in the hose and in most cases that can be repaired – if not you would have to purchase a new vacuum hose. 2nd. You may have a bad inlet valve in your hose and most of them are low volt of which would only cost less than $10.00 and can be replaced yourself unless you have what they call a SuperValve of which has 2 low volt wires and then it is wired to your home electricity and that should be replaced by an licensed electrician. It is a low volt and high volt inlet. #3. the last thing you may check id that you may have a bad relay in the canister itself. Because you should be able to turn on the Central Vac with the switch on the hose and everything should work just fine . feel free to contact your local vacuum cleaner dealer in your area of call the Nutone Factory cust serv line for further assistance. So if you need further assistance, please feel free to contact your local vacuum cleaner dealer in your area or in the yellow pages, or contact the factory phone number or website to further assist you with your questions. http://nutone.com/Customer Service Nutone Inc. 9825 Kenwood Road Suite #301 Cincinnati, OH45242 Customer Service1-888-336-3948 Technical Support1-888-336-6151 Thanks, Don the Vac Man Go Ahead. Use Us.
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.