Mine was the very first run of the Lux Guardian Platinum, so my power nozzle runs after I shut off the machine. I put the green bristle brush roller in my Power Nozzle (with the very stiff brushes), so it's not only a great power nozzle for deep cleaning, but it scrubs in Capture very well also when used with the canister OFF. I know the new models don't run the power nozzle with the machine OFF any longer.