Centauri Carbon TL4980 - Errorcode 104 anomaly in reading printhead NTC

Issue

Centauri Carbon may show an error message after starting: Errorcode 104, anomaly in reading printhead NTC

Cause

The printer is not getting a valid temperature reading from the thermistor (black wire sensor) that is inserted into a hole at the bottom of the hotend. 

This sensor tells the printer how hot the nozzle assembly is, so it can control the power delivery to the heating element. The thermistor may be accidentally unplugged or its wires damaged if you handle the hotend roughly, or it may fail in normal use.

Fix

Make sure the printer is powered off and cooled down.

Lift off the magnetic fan cover, and undo the two 2.5mm bolts holding the hotend in

Pull out the hotend, check the thermistor is plugged-in and the black wires are intact 

If damaged, or plugged-in-but-appears-undamaged, replace it with 001770 - see here

Reinstall the hotend and the fan cover

Power the printer back on, and if the errorcode does not appear, you are done

If the errorcode is still there:

Turn the printer off.

Replace the heater interface board 001769 - see here

Power the printer back on, and if the errorcode does not appear, you are done

If the errorcode is still there:

Turn the printer off.

Replace the hotend PCB 001768 - see here

Power the printer back on, and if the errorcode does not appear, you are done