Question about M&S Systems AirVac AVP1200 Platinum Series Central Vac - 12,000 sq ft Bagged Central System Vacuum

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AirVac ZX6000 won't turn off!

The central vacuum won't turn off unless it's unplugged from the wall outlet. I unplugged both the low voltage wires on the side of the unit and it still stays on unless it's unplugged. I don't know what's wrong with it? What should I do?

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  • Anonymous Mar 12, 2014

    the toe switch will not turn off the vacuum. It stays on unless the unit is unplugged

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  • 37 Answers

There is a relay board inside your unit which is most likely bad. If you have the make and model, you can contact me and I can order the board for you(pending your mechanical abilities). If not, contact your local central vacuum installation company. www.thevacdudes.com

Posted on Jun 12, 2009

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1 Answer

Vacuum has good suction but will not turn off at the handle or when disconnected from the fitting on the wall


Disconnect the low voltage wires going to the vacuum. If the vacuum stays on you have a bad relay. If the vacuum turns off you have a short in the wire somewhere. The bad news is the relays are not available, however there are some companies that sell external relay control boxes that will bypass your units bad relay.

Jul 20, 2011 | Airvac AVP3000 Bagged Central System...

1 Answer

Hi! My central vacuum has worked perfectly until just a couple months ago. I went to plug the vacuum in and it didn't automatically start the suction. When I clicked the switch to the right on the...


It sounds like you may have a bad hose. Plug the hose into the wall but rotate it 90 degrees from the normal position. This will bypass the switch on the hose. If you look at the wall end of your hose, you will see a metal band around it. That metal band is split into two sections. You are trying to plug in the hose so that the separation of the two pieces of metal is not lining up at the top of your inlet. If your vacuum turns on then you have a bad hose. It is possible that you have a bad switch in the hose, but it is more likely that you have a bad hose.

If your vacuum does not turn on, then you may have a break in your low voltage wire somewhere. You can check to make sure it didn't get disconnected at the unit. If the wire is connected then try to cross the low voltage wire from the relay at the unit with a small screw driver. If the unit does not turn on you have a bad relay.

If it is the relay, AirVac does not provide them. You would need to consider buying a new unit.

Jul 17, 2011 | M&S Systems AirVac AVP1200 Platinum Series...

1 Answer

No suction from wall outlet. Power to powerhead. Breaker has not been tripped. Manual mode works on cannister in garage. AirVac VM458.


I had the same exact problem and it took about 4 months to find out the problem. I had a paper clip stuck to one of the orifice in the hall way of my house and that is what I had experienced. The other thing is to check the entire tube system because maybe a mouse or rat has chewed into it. It has all to do with the electrical wire throughout the system. Good Luck

Jan 06, 2011 | M&S Systems AirVac AVP1200 Platinum Series...

1 Answer

Our Easy-Flo built in vacuum system will not turn off, even when the hose is disconnected. We have to turn it off manually. Could it be a short in one of the wall outlets causing this?


Some models have an on/off switch on the power unit itself. This switch is used to turn your power unit on when you are right at the machine.
If there is no switch on the power unit, unplug your power unit from the wall socket, look for two low voltage wires coming out of the power unit. These two low voltage wires are usually either attached with terminals or are tied to two wires coming out with plastic screw on wire caps. Disconnect the 2 low voltage wires. Plug your power unit back in. If the power unit does not come back on then yes, the problem is most likely a short in the outlet wiring. If the power unit still comes on with the 2 low voltage wires unattached, then the problem is in the internal circuitry of the power unit, usually a relay or some units have a circuit board with relay, circuit breaker and other components on it. The relay or circuit board will have to be replaced.
It's a little difficult to check for a short if you have multiple outlets, but if you've recently done some renovations you might start checking in that area.

May 19, 2010 | Easy Flo EF1400 Central System Vacuum

1 Answer

Central vac won't turn off unless we unplug


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.

Jul 18, 2009 | Broan-NuTone CV350 Central Vacuum

2 Answers

NuTone Central vac won't turn off


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

Mar 11, 2009 | Broan-NuTone VX475 Bagged Central System...

1 Answer

Vac running and won't shut off


The first thing I would do is to disconnect the low voltage wires from the unit. Does the unit continue to run? If so, it's probably an internal relay sticking in the unit. You can fix this yourself is you are handy, but I suggest calling your local dealer if you have any doubt. If the unit doesn't continue running, than you most likely have a short in low voltage wiring in your house. Check your inlet valves first by removing the screws and looking behind the faceplates. If you have inlets that are powered with 110v for you power nozzle (Supervalves, or Electravalves), be very careful as you could be exposed to 110vac. Check your vacpans too, if you have any. The wires should not be touching anywhere. If the two wires touch, the machine should come on. Good Luck!!

Dec 19, 2008 | M&S Systems AirVac AVP1200 Platinum Series...

1 Answer

Unit will not turn off, unless unplugged


This sounds like a relay sticking on the control board inside the unit. The only other thing I've seen cause this, would be a short in your low voltage wiring. I had a service call where the wires were laid across the top of metal studs and the insulation had been damaged to the point that the wires would short out on the stud. To be sure it's not something in your wiring, disconnect the low voltage wires from the unit while it's "stuck" running. If it continues to run, then have your control board replaced. This is a somewhat common problem on these units. Good Luck!

Dec 08, 2008 | Electrolux Centralux Vacuum

1 Answer

I have a central vacuum system. When I disconnect the hose from a wall outlet the central canister does not shut down dispite my turning off the vacuum at the handle of the hose. The only way I can get...


What I'm hearing is the canister(Not the Powerhead) portion of the unit is running all the time unless you unplug it. this problem could be caused by a short in one of your low voltage lines running through the house. To determine that just unplug one/both low voltage lines from the canister, and plug it back into the recepticle. If it doesn't start up then you figured out that it is in the house somewhere and not the unit. If it is in the house I would check for water in the valves, or you're just gonna have to chase down the short. If the unit is still running with the low voltage wires disconnected then it is probably the relay on the board, which means you will need a new board unless you're expereinced at soldering and want give it a try replacing just the relay. Which you'll probably need a new board by the time you're done anyhow. LOL

Good Luck

Nov 21, 2008 | Vacuums

1 Answer

Central vac


It is possible that the low voltage wiring that controls your central vacuum has been damaged during the cable work. You can check to see if the low voltage relay is working by shorting the two terminals together at the unit. Just disconnect the two small (18-22 gauge) wires from the unit and short across the terminals where the wires connect. If the unit comes on, the vacuum is fine, and it is most likely the low voltage control wires that have been damaged. It should be a pretty easy fix, if you can get to where the wires are located. They are probably just pulled apart at a joint. Good Luck!!

Jul 10, 2008 | M&S Systems AirVac AVP1200 Platinum Series...

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