Why won't the brush come down anymore. the brush light which should be green is off.

Make sure the hose is pushed all the way in or the safety switch wont allow power to the base.

If you mean the light on the top or side of the Power Nozzle, yes, it should be on for most uses. You can disengage the belt for other uses. The green light illuminates when the belt is turning the brush roll. So, you see, the green light functions to confirm to you that the brush roll is spinning. For carpet, you would want the brush roll spinning. When I vacuum my comforter or sofa, I don't have the belt engaged because I don't want the roller to grab up my fabric. For that use, the green light is not illuminated.

What color light are you referring to? If it is one of the green lights that is normal for the up and down adjustments. If it is the red one that is another issue. If it is the red one, what does it do while it is on? Does it flash or is it on solid?

There are much quality differences in belts but the foot pedal with arrow is made to set the hightbecarefully because of easy broken pedals . but if the brush is setting on the deepest stand then its not rotating anymore and the brush stands still. its very easy how you can disassemble the brush and can place them in 3 differend levels in height ? on the grey bearing holders outside of the brush there are 3 different indications l and ll and lll the best is to set so that the carpet if its a thin one the brush must setting just lower then the suction mouth so that the brush are more coming out so deeper come out of this suction mouth so that the suction mouth has made a little more distance from the carpet because when the brush rotate to deep insite the suction mouth .1 the tension of the belt on the brush is lower and .2 the suction mouth sucks vaccuum on the carpet and the brush doesnt rotate because of the force of suction power, play around with the different heights you find the right level.

The green light does not affect the performance of your vacuum. There is a small magnet in the brush roll that makes the light glow to show you the brush is spinning properly. If your light worked before you took the vacuum in for service you can look at the brush roll to see if it has been installed properly. The magnet should line up to spin at the spot where the green light is. If the brush is not installed properly or the wrong brush roll is installed the magnet will not line up with the green light.

You are referring to the green led light on the front of the machine that tells you the brush is rotating? this is operated by a small magnet on the brush roll, when rotating it generates a small current to bring the light on. Remove the brush roll and check for damage behind the green led inside the case, also check for the magnet on the brush roll, ensure it is not missing and the brush roll is in the correct way round, magnet needs to be at green led end (ie to the left)
Magnet is fitted flush within the brush roll close one end and is around 6mm 1/4" diameter.
Green light not working will not affect the machine in any way.

You are referring to the green led light on the front of the machine that tells you the brush is rotating? this is operated by a small magnet on the brush roll, when rotating it generates a small current to bring the light on. Remove the brush roll and check for damage behind the green led inside the case, also check for the magnet on the brush roll, ensure it is not missing and the brush roll is in the correct way round, magnet needs to be at green led end (ie to the left)
Magnet is fitted flush within the brush roll close one end and is around 6mm 1/4" diameter.
Green light not working will not affect the machine in any way.

Assuming that the automatic height adjuster is working properly, most likely your Sebo needs a new brush roll because the bristles on the old one are worn to the limit. To test the height adjuster, put the machine in the normal operating position (with the handle not upright) then switch on - the green "down" light may come on briefly (or may stay on if the brush is worn). Then, leaving the machine switched on, move the handle to the locked upright position - the green "up" light should come on, and you may be able to see the whole machine tilt backwards slightly as it lifts the brush off the floor. If that happens, the adjuster is working properly and you definitely need a new brush roll.
I hope this helps. If you need more guidance, just post a reply here and I'll get back to you soon. Please remember to rate this answer as I do value feedback. Good luck!

They lock into that blue arm with the two holes in it. The erm is plastic and has the spring loaded latches that hold the brushes in. If the latches have failed the brushes won;t stay in. The other option is the latch pins on the brushes have brocken or worn out. Turn the machine over and try to make the brushes latch, also push the brush release buttons several time to make sure they are working. Good-luck.

Kirk Thompson
San Juan,PR

Well you could have a clog in the hose or the inlet down by the brush roll. other then that, if it s less then a year old, take it to Sears for repair, it would be under warranty.