You are warming up the hot end before trying to retract the filament? If so, pull the nozzle and give it a cleaning. Good time to check the tube as well.
Type: Posts; User: number40Fan
You are warming up the hot end before trying to retract the filament? If so, pull the nozzle and give it a cleaning. Good time to check the tube as well.
Did something goofy happen, like the heat not being turned on? Was the extruder motor/gear clicking?
Is the tube missing from the nozzle?