That fan really bothered me when we first got our TT, especially at night when all was quiet and it was all I could hear. The more DC amps the TT pulled, the more fan would spin and the louder it got. I replaced all my incandescent bulb to LEDs to minimize the draw the lights put on the converter and fan run much slower now.
2013 26BH ghetto model w/ 4 plain rims and some rust
2001 Silverado 2500HD 6.0 gasser
I have a fever...and the only cure is more camping!