I would youtube your type of aerator and see if they have any videos on how to repair it? If it overheated if my be locked up tight and toast.... sorry to say. Hard to tell on this end. Does it hum or anything when you turn it on? You could have some brushes going bad. Unplug it again and take a hammer and hit it lightly on the side of it just tap it in a few spots. You may have a dead spot on your brushes and it may take right back off again if you can get it off the dead spot.

RC

The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!