Negative temperature reading on temp0. Board broken?

[0nn0]

I have a problem with my Duet 3 mini 5+ board. I'm not sure if it is broken or not, but when connected to temp0, the thermistor shows a ~40°C negative offset from the real temperature. I have now connected it to temp2, and it works as it should. Does this mean that my board is broken?

[Phaedrux]

What board is it?

[0nn0]

@Phaedrux It's a Duet 3 mini 5+. I have updated my start post.

[dc42]

@0nn0 run M308 S# (where # is the sensor number) with it connected to temp0 and read off the L and H values. Then reconfigure it as temp1 and do the same again. If the H value for temp0 has somehow got set to a large value, that could cause the reading to be off. Otherwise, it's likely that the series resistor has failed, most likely because of electrostatic discharge from the hot end metalwork to the thermistor.

[0nn0]

@dc42 Thanks for the suggestion. I plugged the thermistor back into temp0, and somehow the value was now correct. I'm not sure what caused it to be abnormal before.

I did check M308, just to see if all was okay, and the values are L5 and H6 for both S0 and S1. That does not seems to be very large to me. Maybe I had a bad connection, even though I did press the connector all the way down.

Anyhow, thanks for the support!