When I hit the big red button on the printer control panel it does what is necessary and causes my CR-10 to reboot. Perfect.
However after that reboot the start script for any following print causes the filament purge (G1 E25 F300) to go in the wrong direction - it sucks rather than pushes filament. Obviously the reset has configured the nozzle direction to reverse, though everything else seems normal.
The only recovery for this situation is to power cycle and reconnect the printer. That reversal is sticky and doesn't reset otherwise.
Is there some GCODE I can use to change the filament feed direction?