Discovery brushes won't turn. All bearings clean.

https://www.weeklytools.com/category/vacuum-cleaner/

With the growth of technology, vacuum cleaners' importance to keep your beloved home clean is endless. A machine can be disabled. But there is a solution. Following a few simple steps will help you to repair a damaged vacuum cleaner at home. So, Let's discuss Vacuum Cleaner Repair. If your vacuum can't work like before

Hi ken wright.
Remove the bottom of the head of the vacuum...remove the roller brush assembly.
Clean the assembly...remove the end caps and clear all hair,strings,etc from the end cap and rotating brush head.
After cleaning the brush head and bearings, lube the bearings with a good grade of machine oil such as 3 in 1 oil.
Check your belt condition.
Reassemble and you should be good to go
Please take time to rate me

the rectangular and round ends are not intended to turn ..they stay fixed.. the bearing is inside the brush next to the round and rectangular ends .. if the ends dont move freely then there may be hair or string wound around the bearings .. clean that out so that things turn freely (the end may even come off) ... once you have things free and clean .. then putting the brush back in place does take some strength .. the belt gets very tight and its difficult but possible to get the rectangle inserted in its slot ..

Reboot is probably not your solution. Your Roomba will react to invisible signals or 'interference' from other electrical appliances as well as the invisible wall boxes. You can clearly see how this happens when a Roomba gets near your computer or other device that is on. Also, the Roomba will go in circles when the dirt chamber is full or it thinks it's full. Try a thorough clean of all major parts including the brushes. Sometimes this activity will occur when the brushes get snarled on thread or carpet fibers.

rchu is exactly right. No need for a complicated disassembly. If you have never pulled off those end bearings/caps, the hair may be very impacted, but removing it should solve the problem. The instructions will tell you by color (yellow for mine) which pieces come off for cleaning. Be sure to remove all such pieces. If the fit seems tight, it's probably because a lot of stuff got stuck in there. Be gentle but firm, and things the should come off will come off. Once you've cleaned all the pieces, the thumping should be gone.

No matter your model Roomba, this occurs when Roomba has gone "crazy." Its brain is no longer working properly and you can usually tell this when you've cleaned the dickens out of it a few times and the behavior is still the same. There's only one possible user fix and that is to take out the battery, hold down the power button for 20-30 seconds then reinsert the battery.

If that doesn't do the trick, IRobot might send you something called an Ozmo which you put in the data port to rewrite Roomba's brain. Unfortunately this requires it to be under warranty unless you get lucky. Good luck, all!

grrrrr

I just fixed mine. It took me all of 10 minutes. Pull the brush out. Stand the brush on end on the edge of your study work bench/table top. while holding the brush vertical( on end) take a small phillips screwdriver and tap using a hammer on the metal pin you see in the middle of the brush. Keep tamping and the whole assembly will come apart. What you will have then is a long metal shaft, 2 bearings(they are acutally skateboard wheel bearings same number same make). Clean the gobbed up hair with a razor blade and then reassemble by tapping back together. The bearing wont be worn out because they are way too tough for a vaccum. We used ride down hills on them! a ten minute fix wow and you wont have to drive to vacuum shop and spend $$ and time

I had the same kind of problem with my model 400 today...after starting it and having it go in a circle for 30 seconds or so it would finally run into something and then back up a few inches, turn, then go forward a few inches, then back up a few inches, turn, then go forward a few inches, etc., etc.. I tried cleaning off the four pairs of sensors under the bumper and blowing out various things underneath (by mouth since I didn't have any canned compressed air). It didn't really help. It then occurred to me that I had a leaf blower! I put the Roomba upside down on the grass, put the leaf blower on high, and blew at it from all directions and up close. More dust came out than I thought would. It has been running normally now for the last 45 minutes.