Bought recently a FlashForge IDEX 3D printer Creator 3. I have printed succesfully a number of models, some reasonably complex. Both extruders were loaded with PLA. Now I wanted to change the filament in one of the extruders to PVA as I wanted to use water soluable supports. For some reaon when I try to unload the filament, the extruders start to heat as the screen shows, however the temperature does not rise as described in the guide. Waited 15 to 20 minutes - no change at all. Followed step by step the instruction without success. I also tried loading filament - exactly the same - no rise in the temperature. When I print - both extruders get heated normally and there has not been a problem printing. Any idea as to why this is happening. This is kind of annoying as I cannot change the fillament. Any help will be very much appreciated.ThanksMiho Mihov