Brush in Electro Plus Powerhead does not spin

I have an S548 Aluminum canister vac that's about 6 years old.  Tonight while I was vacuuming, the LED on top of the powerhead that is normally green turned red and the brush stopped spinning.
I took the brush cover off the bottom, took off the top cover, took off the inner cover.  The wiring and connections all seemed to be intact. I took the back cover off the neck of the powerhead (where it connects to the wand) and the two yellow wires in there looked good too.
I suspect the powerhead may need a new motor.  Can someone  let me know what the red light might mean.
Thank you in advance.