My bag was full on my electrolux canister and when I replaced the bag, the electrolux is on but the motor won't come on. The lights are lite up on the canister showing that it needs a new bag but the bag is in the canister.

Assuming you mean a genuine Aerus Electrolux canister vacuum, the "full bag" light comes on when the bag needs changed. If that doesn't work, the gauge on the top needs removed and serviced or replaced. Hope that helps! Thanks!

ok, you need to bypass the auto shut of. Put the vac on it's side and pull off the sliders on both sides.Carefully pull machine apart.lift the front of the piece that hold you bag.Underneathe there is a clear tube plugged in to a round thing on switch area.Simply pull the tube out of the rouind trhing.This will allow you to fillthe bag without shut dow.Just make sure your bag doesn't get too full....Chris

Symbols..Question mark means "Put a bag in me", checkered light means : "Change me, I'm dirty"....pre-lit power light means: "You have Powaaa" to the unit and the thermostat light means the motor is too hot if it comes on, (most likely from a hose clog) and needs to cool down before the motor will run again. The settings on the control valve basically have to do with the auto shutoff when the bag needs changed. The lower the valve is turned, the more full the bag will get until it shuts off. Hope that helps!

some motors have a reset button that has to be pushed to get power back to motor after over heat. it is ussually located near the rear of the motor

Electrolux uses a pressure differential control valve. This valve measures air before and after the bag. There is a orfice or small hole where the hose connects to the vacuum cleaner, and a orice at the back of the bag canister. As the bag fills up the suction pressure reduces at the hose connection and increases at back of the bag canister. When this happens the control valve has a diaphram that closes, which shuts the vacuum off and gives you a full bag light. There is a thin plastic flange that prevents an o ring on the control valve stem from coming off. The flange breaks, the o rings comes off the stem and the vacuum will shut down indicatiing bag full. The after market price is about 22.00. The valve is easy to replace if you are familiar on electrolux vacuums. When I replace these valves, I use epoxy two part plastic putty on the flange of the valve. It takes 2 days to cure, but the flange will not break.

If the bag full light keeps coming on, you can first try adjusting the dial on top of the vacuum cleaner. If that does not work, then you need to change the control valve. This is an internal component of the canister and is directly below the dial. You will need to follow the instructions on a previous post to open the Electrolux plastic canister vacuum, and remove the bage cage. Once you remove the bage cage you can change the control valve, and this will solve your problem with the bag full indicator.

make sure the bag is installed properly and the bag door is making contact with the small switch by the bag.

Check to be certain the thermo lite is on and not the bag full indicator. The thermo detector is very reliable, but the bag fill valve often fails. If it is the thermo, check your hose and wand for blockage by dropping a coin through them,before opening the vac itself.Otherwise you may have a bad set of motor bearings causing the motor to overheat due to its age.
The 2100 and all its canister cousins made since 1982 seem to be prone to failure of the dial valve on top cracking internally. The causes the bag full indicator to come on and the vac to shut down.
To open the vac you will need to slide the locking keys and bumpers forward with the bag door open. Do this with a set of pliers. Once done the vac will open from front to back like a **** shell. Be careful to look at the underside hinge are of the bag door before separating and mark and locate the wiring harness . This vac only goes back together one way, perfectly assembled it pops together with ease. If any piece is out of line it`s like a RUBIKS Cube. Take your time . OEM parts are only available through an AERUS Elctrolux dealer or repair shop

This sounds like the valve assembly (full bag control) is faulty or one ov the tubes is clogged. You will have to take it to the shop.

my oxygen has a little red lever on lh side of bag enclosure, that has to be pushed to left and bag then is free to be removed. make sure you have the correct bag to replace.