2: Extruder thermistor
If you encounter a MAXTEMP alarm during initial testing, chances are the fault is
with the extruder thermistor. If the extruder is reading above 700 degrees, then the
thermistor has a short circuit. It appears that many cases are caused by the bolt cutting
into the insulation on the thermistor wires and shorting them together. A temporary
fix for this is to undo the bolt completely, and then restart the printer and see if the
error has cleared. A more permanent fix is to use a short length of WS5504 Vidaflex
Tubing to reinsulate the wires before tightening the bolt. Keep in mind the extruder
can get above 200 degrees, so any repair has to be able to handle this temperature.
