My 3D printer is reading sd card but if I want to print anything that my printer start geting warmer but at one point the extruder stops heating and only bed is getting warmer. When bed is at 65 degrees (set in file) my extruder heating is resumed. When all is heated nothing heppens and after few minutes printer ends printing. That is happening at new files with new settings but also at old files that I was printed without issues. I reset the settings and formated orginal sd card and my second sd card. I don’t have any idea what more I can do with that problem.
I had a problem with the printer not reading my memory card. I solved this by gently scratching the card contacts to create a burr. To be honest the reader doesn’t feel that it is gripping the card hard enough and in your case expansion due to heating may lift the contacts away from the card thus stopping the print. If this doesn’t fix your problem no harm will have been done. Regards David