The problem seems to be limited to the first spool slot. When I start the print and the printer has completed the start routine, it goes to the hooper to load the filament. The temperature is raised to Flush_Temp 250 (it would be nice to be able to adjust this here) and flushed. Up to this point everything was fine. But then the temperature should be lowered again to the regular printing temperature. However, this is not the case for any of the filaments in the first slot of the CFS. In the other slots 2-4 the temperature drops back to the printing temperature after flushing. Even changing the filament profiles from slots 2-4 to the first slot did not change anything. Therefore I can rule out an error in the filament profile. It seems more likely that there’s an error/problem in the first slot (i.e., T0). Regarding my setup, it’s a K1C with the CFS upgrade kit, firmware version 2.3.5.33. The printer is rooted and used with Mainsail. I use the Orca Slicer as a slicer.
P.S. I also have the problem with the display freezing.