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Re: 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!
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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.
Firstly; dismantle the plug and replace the fuse with the same rating as the one you have just taken out. Replace the plug cover, put the plug into the socket and try again. If this doesnt work, there may be a problem with the internal fuse (if one is fitted). Two choices here, either refer this unit to a qualified service personnel/ the place where you got it from, or do the job yourself (which will save you a whole bunch of cash). In your circumstances, I would take it back to the place you got it and ask them to put the fault right, or replace the unit completely; if it is past its warranty or guarantee time, then get back to me with a make and model number of the unit, and I will give you step-by-step instructions on how to solve 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.
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
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.
one of two problems cause this. first is a short in the wires that turn it on, the small wires going to the side of the body unplug one of them to see if thats the problem
second is a stuck relay inside the top cofer of the main body
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
http://geeksquad.fixya.com/ThreadView.aspx?prdid=113669&thid=657359 Electrolux Centralux Posted by Brucebob on Jun 09, 2008 I have an Electrolux Centralux. When I plug the hose in at one of the wall outlets the motor will not start. If I go to the motor and slap the unit it will start.....then...it will not stop unless I unplug the power cord to the motor. If I plug the power cord back in, the unit will not restart until I slap the motor unit again. The unit has only been used 20 - 30 times. Any suggestions?Thanks, Bruce Hello, I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. You may have a bad inlet or household outlet; try all the inlets in the house too. But it sounds to me that your carbon brushes are dirty and need cleaning or replacing would be my 1st suggestion. Take a good wire brushes or pipe cleaner to clean the inside of the carbon brushes if they stick then replace them. So if the unit has only been used 20 to 30 times I would suggest some one to come and look @ it who did the install because it is still under a factory warranty and if you start messing with things you will void the factory warranty on the motor. And then if it is the motor for some reason then the factory or vendor will eat the cost of the repair. 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://electrolux.com/Customer Service1-800-896-9756 Electrolux Home Care Products – North America P.O. Box 3900Peoria, IL61612 Thanks, Don the Vac Man Go Ahead. Use Us.