I've had issues with my hot end and decided to replace the whole assembly with this. After the replacement, my printer started reading about 135/185 °C for the hot end and bed are both at room temperature. It also gives the "Heating Failed" error message. Printer halted when I tried to heat it.
Things I've tried:
- Checked the wiring, the thermistors are reading about 110k and 10k at end of the wires.
- Tried updating the firmware with a few different thermistor settings. Only the static (dummy) ones worked (reading a static value of 25/100 °C)
- Tried with old thermistor and reading stayed at 135/185 °C.
I'm suspecting something wrong with the motherboard but was hoping I could figure out what's wrong before going ahead and buying a new board. Would appreciate any thoughts/suggestions.
In troubleshooting the issue, I tried disconnecting one/both of the thermistors at a time and the reading stayed unchanged. Now thinking I might've somehow broken the board when I was disassembling it.
Upon receiving a new motherboard, that fixed the bed temperature reading. The hot end is now reading -14 °C with the thermistor plugged/unplugged. Took the resistances on the old and new hot end thermistors and couldn't get reading from either. So turned out both the stock motherboard and my hot end thermistors were not working. Ordered new thermistors and that should fix the problem.