Got a printer that worked fine for two weeks. But now cura refuses to even try to run pre heat. Always claims the setting is 0. And even when I set it manually and it starts printing it will never extrude anything on the left half of the mat. Only half formed squiggles on the right half. Tip is hot. Feeds fine when manually told to feed. But refuses to actually feed filament when printing.
Are you trying to control the printer via Cura? Put the gcode on the micro-SD card and try again…