On my M&S Air Vac AV425 central vaccuum system, the system usually turns on by inserting the vaccuum hose into one of the vaccuum outlets. However, it now runs continuously. I am able to turn it off only by unplugging the vaccuum from the electrical outlet. I would like to know how to trouble shoot the problem or how to find someone who services Air Vac systems in the Bridgewater, New jersey area.

If you can unplug the central vac and plug it into a different outlet that you know is on a different breaker and test it out to see if it trips the breaker,or temporarily rewire the central vac to a different power supply.Make sure the breaker is the correct amperage for the central vac,last read the instructions to see if you need a dedicated circuit breaker,you might have to many accessories plugged into that outlet.

Broan 450 air-watt and 8.5 amp power unit. Covers 3,000 sq. one 30-ft. crush-proof hose with on/off switch, one 10-in. wide hard floor brush features swivel neck for easy maneuverability around furniture. My new home is just under 2000sf. Will this new unit have enough suction?? Just buy or don't??

I would recommend checking your wall outlets where the hose plugs in for any type of clog in the tubing. If the vacuum itself has great suction but when you go to the wall outlets that is probably something in the hose that is stuck. If cleared it will most likely have excellent suction throughout the entire system in the house.

Is there suction at the end of the hose? If not, the hose is clogged. Generally the blockage is located near the handle, but sometimes at the other end. Occasionally, if something long, like a straw, is sucked up, it will get caught somewhere else in the hose that's impossible to get to.
You can try to hold the wand end of the hose directly to the CV tank and turning it on. This should clear the clog. If not, hold the handle end to the blower of a shop vac or canister and turn it on. The other end should be either in a large plastic bag, inserted in the in port of the vacuum, or directed outside.
If there is suction at the end of the hose, the most likely place for a clog is at the elbow on the power nozzle or just behind the brush. This can be cleared by using the handle of a wooden spoon or similar blunt object to push the clog back out toward the brush.

If none of these help, take the vacuum to the nearest Aerus Electrolux store for assistance.

http://www.aerushome.com/storelocator/

TRY JUMPING THE CENTRAL VAC INLET WIRES AT WALL! IF COMES ON SOMETHING IS MISSING ON HOSE TO WALL CONNECTION. MOST HAVE A METAL RING TO ACTIVATE THE INLET DOOR WHEN HOSE IS CONNECTED.

You might have a plug or clog in the upstairs lines. for information on how to remove a clog in a central vacuum system see this article:

http://centralvacproducts.blogspot.com/2009/01/how-to-unclog-central-vacuum-system.html

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

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, OH 45242
Customer Service 1-888-336-3948
Technical Support 1-888-336-6151
Thanks, Don the Vac Man
Go Ahead. Use Us.

If the low voltage wires are hooked up to it, then you probably have a stuck relay inside the cannister. It could also be the switch in the hose handle.