I have a K1C with latest firmware 1.3.3.46 (my printer download automatically last month, in december).
I have a warping problem so I lower side fan from 80% to 40% but the flow remain exactly the same.
So I try again with 3% (on the touchscreen is not so simple to choose numbers) but the same flow.
It seems that the flow is not proportional it work on at max speed or off.
I try only from touchscreen while printing.