Auxiliary fan on when set to be off

[Alex_vG]

Hmm, my topic was about the exhaust fan at the back. Maybe it is still helpful:

Exhaust Fan always at 100%

Hello, fresh X1C owner here. I have 11 years printing experience with Ultimaer & Cura, so there is a lot to discover. After printing some standard things, today I started profiling my first filament (PLA: ColorFabb Regrind). One strange thing I can’t get rid off: after the first layer, the exhaust fan at the back always turns on at 100% making a lot of noise. I looked into the filament settings → tab cooling, but there are only settings for the part fan and the aux fan, no setting for the exh…