The floor lights on the handle are flashing and the floor piece will n

I have the same problem except it is intermittent. The vacuum works fine for a little while then all three floor lights start flashing in unison and the brush in the floor unit stops spinning. I can switch the unit off for a few minutes then start it again and it will run normally for a few minutes then shutdown again. I suspect there may be a thermal overload protection device like a thermocouple switch in the floor unit that is faulty. I have not been able to find a service manual for the unit that explains what it means when all three floor lights on the handle flash in unison.