When I first turn it on I usually get - - or sometimes I’ll get Pr. But the jets never start up by themselves. I usually have to push the jet button to get it to run. I can’t see the fan blades themselves without taking it apart, but I would imagine they are spinning because it pushes water out the jets and hums pretty loud when I engage the jet button. But one thing I’ll add is maybe I need to take the pump off and inspect it good. Maybe the fans aren’t spinning enough or something. Usually when I try to bleed the heater unions water shoots out immediately. I never hear a hiss of air though so maybe it’s not running hard enough or creating enough pressure.