I am now at peace with my 294. The camera has a cooling limit of between 35 and 40 degrees below the “ambient”. And ambient is the ambient temperature of the sensor which could be warmer that the space which I myself am sitting in or the space the camera is sitting in. The fan tries to ward off the warming temperature of the sensor in order to keep the sensor’s surrounding temperature (ambient) low enough as the whole camera begins to warm up.
I am still test-imaging with it and can bring it down to -10c which seems to be what everyone else is doing and I am getting good results with it.
I am beginning to realize that a short delay between images may be useful in keeping the temperature from climbing. I notice that when I take biases - the temperature then can’t keep very steady no matter what it is set to.