The motor running the beater bar on ny Electrolux canister vacuum cleaner runs intermittently. It runs about 2 minutes and then cuts off and automatically starts again after a 1 to 2 minute interval. I have tried taking it apart and removing the dust and grit in the beater bar attachment but with no change in operation. What would you suggest?

take the cleaner apart and make sure that the wires are all hooked to the on and off switch that got to the beater bar that is the main part of the problem improper wireing

This model has a complicated trouble-shooting procedure that needs to be done by an authorized Aerus Electrolux service tech.
This is often caused by a bad relay board or a Triac. However, problems in wiring or swswiches, including the hose wiring.
I stress that this must be done by an authorized Aerus Electrolux service tech.

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

Hello, W/D here.
Since the brush will not spin, but the motor works, either the belt has come off of the motor shaft, the belt is worn past it's useful life, or the beater bar has seized.
1. Turn off the power (unplug).
2. Remove the bottom plate. With the plate off, use your finger to test the tension of the belt. It should be tight, and roll when you roll the beater bar by hand.
3. Remove the beater bar and belt. Inspect the beater bar, particularly by the bearings. Remove any twine, hair, etc.
4. Inspect the belt for abnormal wear. If there is any significant wear in the belt, replace it.
5. Reassembly is in the reverse order. Place the belt on the beater bar. While holding the beater bar close to it's position, place the belt on the motor shaft. Rotate the beater bar bearings to their proper position and install the beater bar. Replace the cover plate.

Best regards, --W/D--

Is the power nozzle motor itself not working? If it's not, the problem could be the wiring, the switch, the vacuum power switch, the connectors from hose to machine, or the circuit board in the machine.
My best guess would be the connector from hose to vacuum. The vacuum connector are cheaply made and held in place by flimsy plastic.
If the pn motor is running, it's most likely a broken belt. Initially a worn or loose belt would cause intermittent operation of the brush. Replace it and the brush should work.
Depending on the part, your machine may still be covered by warranty. Check your manual or internet for warranty information.
If under warranty, take it to the store your purchased it from for repair or replacement.

Is the power nozzle motor running? If not, press the reset button located on top of the power nozzle. If it is, then either something is caught in the brush or the belt is broken. Due to some difficulties in reassembling the power head correctly, I highly recommend this seemingly simple job being done by an authorized Aerus Electrolux technician. If the problem is something else, the tech can easily find the problem. Take the entire machine in to the shop to help the tech narrow the problem down.

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

Sounds like you're right. New motors are available at your nearest Aerus Electrolux store. They used to charge the same amount for selling the motor and letting the buyer install it, or for installing it in the shop. Worth checking in to.

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

Electrolux EL7020A Oxygen 3 Ultra Canister Vacuum Cleaner
i have 2, 1powers up and all 3 lights flash change hoses from the good one that work fine and it still wont run and the three blue lights continue to flash and wont run

Remove the beater bar and clean the debris from the bar and the end bearings. Remove the belt (remember how it is installed) and check it for any damaged areas. Make sure the bar turns freely before the belt is attached to the motor drive. Hope this helps!

If your talking the motor on the beater bar, then chances are either when the beater bar was attached to the hose near where you hold it, it did not lock, and the connection is intermittent, or the cord has an internal break.

http://geeksquad.fixya.com/ThreadView.aspx?prdid=0&thid=783793
Generic problem for all Vacuums
Beater bar Belt Removal from Upright Electrolux...
Posted by wrenn on Jul 14, 2008
I am trying to change the belt on an Electrolux Model 1717 Upright Vacuum and I am having difficulty disassembling the vacuum to remove the beater bar and belt.
Hello,
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure. . Normally there are screws, clips or levers that would remove the bottom plate or if that does not work then the top cover will come off and that will expose the belt. Once that is off and the belt is exposed then cut off the old belt and then lift up the brushroll on the pulley end and install the new belt around the pulley end and re-install the brushroll. Then use a belt puller or a screwdriver with a bent right or left end to stretch the belt onto the motor pulley and then track the belt in a straight line and reverse you steps in the reinstall of the top cover or bottom plate. 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 Service 1-800-896-9756
Electrolux Home Care Products – North America
P.O. Box 3900 Peoria, IL 61612
Thanks, Don the Vac Man
Go Ahead. Use Us.