1

my wanhao duplicator 4 has recently developed a fault were the left extruder doesnt sence any temprature. i have changed the thermocouple and checked all of the wires but i cant find any bad connections.does anyone know how to fix this?

thanks

2

Check lines with multimeter if you haven’t already. Try swapping plug with other extruder and see if you still have the issue, if you do then something on the board may be cooked. Verify that hot end isn’t electrically hot to ground.