I'm using sequence generator pro with my asi1600mm pro when i have it cooled to -20 the fan runs ok but i have noticed that when i set to warm up the fan cuts in and out is this correct?.
Did you turn on the warming aid on SGP?
Does this camera show the same behaviour in other software?
Yes warming aid turned on,only ever used camera with sgp just first time I have noticed fan coming on and off because camera is in observatory and only happened to be in their to notice what was happening.
I think maybe it is due to the software is controlling the camera to get warm gradually.
Actually there is no need to use warming aid when stop cooling.