Having problems with your Bissell 3920 Bagless Upright Vacuum ?

Vacuum wont spin when on carpet but will spin if tilted off the carpet

Answers :

Remove the bottom plate of the sweeper. Remove the sweeper brush roller and clean the end bearings of debris. Oil the bearings lightly with 3-1 oil or similar machine oil. Clean the motor shaft with alcohol as well as the brush drive area, and the inside of the drive belt. Test on a carpet for improvement--if still stopping, replace the rubber drive belt. Hope this helps!
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Vacuum wont spin when on carpet but will spin if tilted off the carpet

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