-Make sure you downloaded the correct firmware (if it’s been reinstalled) since the single extruder and dual extruder have different wiring setups.
-Check the extruder fan wires in the electronics box to ensure they haven’t come loose. Refer to the wiring guide in the manual for more information.
-The fan is controlled by the slicing program, as such make sure you have the fan turned on in your slicing program.
-You can always test the fan from the LCD panel. Go to “Control > Temperature > Fan Speed” and set it to about 120. 256 is the max fan speed and 0 is the minimum.
-Check the extruder fan wires in the electronics box to ensure they haven’t come loose. Refer to the wiring guide in the manual for more information.
-The fan is controlled by the slicing program, as such make sure you have the fan turned on in your slicing program.
-You can always test the fan from the LCD panel. Go to “Control > Temperature > Fan Speed” and set it to about 120. 256 is the max fan speed and 0 is the minimum.