20
5.
If the heater cartridge is very high or low resistance,
replace it.
If the heater cartridge resistance is OK, replace the
controller board.
6.
The second thing to check is that the cooling fan is
spinning and not obstructed by dirt or other debris.
Clean excessive debris and/or check the fan’s
connection. A stopped fan will likely need to be
replaced.
7.
Third, check the entrance to the nozzle between the
idler and drive wheel. If a small piece of filament or
other foreign object is bent over the nozzle entrance
new material will not be able to get past it.
Remove the obstruction as necessary. The idler, fan
shroud and drive wheel may need to be removed for
easy access to this area.
8.
If all of the above are OK, you most likely have an
extruder clog.