I had just completed a cleaning job on hardwood floors and the vacuum was on its charger. At the beginning of a new cleaning job on carpeting, the RV20 is reporting, "Main brush is stuck."

It is actually not stuck.

• Brush and vicinity is 95% clear of pet fur and hair. Yes, I have a dog.
• The area is clean of any general grime which tends to build-up every few months. I cleaned it two days ago.
• With the brush installed, spinning the brush while it's engaged with the internal gearing and/or motor has what I subjectively say is the appropriate amount of resistance. The mechanism is not actually jammed nor seized; it turns.

Any ideas, before I disassemble it? I have nothing to lose, though a two-year life is awfully short of expectations.
 

Thanks!