99 metro fan

will took out the fan ,thought there would be a tooth pick or some thing like that ,it turns to be the motor getting old ,it sounds like the front bearing of the fan motor,,dar, i lift the computer pulged in ,because i did not know if i should take it out or not, any how there a little heaters in the heater ,a preheat er, i am sure its not working ,i would have to look in my repair manual to see what it’s called ,reisitor it’s some kind of min heater,, and i found #1,2,3 levels will not work with out it, it did not take long ,99 metro fan ,