Dyson DC14 All floors Bagless Upright Cyclonic Vacuum "loud buzz answering machine" Questions

loud banging sound, screeching, hissing ? Is the noise electrical noise from motor EG popping, buzzing, does motor pick up speed then slow down? Is there a smell EG electrical burning, rubber burning.

...loud crunching noise. Solution: twist the cleaning head so the gears mesh again. Operate for a few seconds. Repeat. I took off the bottom cover (5 screws) to adjust the clearance. No adjustment. The ...