On one occasion , it looked like the louver had stalled . That is what I messed with . Did not get it taken apart enough to get to the fan or motor .
But the documentation goes in the direction of the indoor fan motor .
All I can say is I am thankful it has been working since I tinkered with it .
My guess is the Chinese units ( a majority of the market ) come out of a handful of factories ?
https://www.google.com/url?sa=t&rct=...THI4ZsEyXaePlQ
See page 38 , 42 & 57 .
God bless
Wyr