I am not sure if this is a MaxIm DL problem or a camera problem. I will typically run two sessions of MaxIm DL; one session for my STXL16200 imaging camera, and the other for my ST2000-XM which I use for guiding. One of the recurring issues that I have been facing is that the cooler control on one or both cameras will lock up. When this happens, the cooler will suddenly show a 0.0 Deg setpoint even though the cooler has been running and cooling. If I try to change the temperature setpoint the camera will not accept it, and in most cases the camera will become completely unresponsive. When this happens I can not even disconnect it and shut it down. Instead, I have to pull the plug on the power. The other night this happened with the ST2000, but rather than try to re-enter the temperature setpoint I just left it alone. The cooler kept running and cooling, but the temperature setpoint was showing zero. From what I can tell, the cooler output was also frozen at 63%. The camera was in guide mode at the time, and the guiding seemed to be normal. Here is a screen shot below. Note that the temperature setpoint was originally -17 Deg C I am running MaxIm DL Pro version 6.26, but this problem has been going on since version 6.22 or before. All of my drivers are up to date.