Hotend thermistor reading -273.1 C

[stefvandermeer]

I'm setting up a new printer with duet 3. After assigning the hotend thermistor the temperature reading suggests the hotend is -273.1 C which is not the case. what could cause this ? I'm using an 104NT thermistor. When I try connecting a spare PT1000 it seems to read just fine.
config Gcode: M308 S1 P"20.temp0" Y"thermistor" T100000 B4658 C6.5338987554e-08 ; Semtec Thermistor

[Rushmere3D]

@stefvandermeer

I believe the correct setting is: M308 S1 P"Your pin number" Y"thermistor" T100000 B4725 C7.06e-8

[engikeneer]

@stefvandermeer -273C typically means an open circuit (infinite resistance).
I would start by checking your wiring

[aronmeszaros]

@stefvandermeer it sounds like a wiring problem, try with another thermistor or check the sensor pin position if it is really the one that you connected it to

[stefvandermeer]

It doesn't look like a wiring problem. I m using a toolboard on a Hemera tool so the thermistor leads are about 30 mm long and directly connected to the toolboard. I checked with a spare PT100 thermistor which seems to work just fine + when I check with a multimeter it seems to be infinite resistance. so I think it's just broken. I ordered a new one, I'll let you guys know if that solved the problem. thanks for the help.

[jay_s_uk]

@stefvandermeer PT100's don't work with the toolboard

[stefvandermeer]

@jay_s_uk it might be a PT-1000 then it came with my mosquito, nevertheless that one seemed to work just fine when I temporarily wired it up and changed the B and C values