Lasko Ceramic Heater "clear upper lower filters" Questions

...clear of blockage. i removed the black hose and checked the internal fan...seemed maybe a lil stiff to me...but im not sure how freely it should turn...it didnt spin on and on after i flicked it with ...

...upper sight glass, cycled a few times and then went back into lockout. Is there anything else I can try to fix this problem. I found a fix to my problem. Hope this helps someone. There is a hose that ...

...upper adjustable heater vent and blow out the dust that has gotten on the heater element. ( You are actually blowing into the unit, clearing off the lint/dust that has gotten on the backside of the ...