I am in the process of buttoning up a Nitehawk conversion on my Voron. I also replaced my extruder thermistor with an OE replacement purchased from a reputable vendor.
Post setup, my heated bed is reading spot on (it's 18.3 C in my basement aka 65 F). I verified that my extruder is also at ambient temperature by wedging a Thermapen under its silicone sock and letting it acclimate for 10 minutes. The I'm not sure why the extruder would be reading high.
I bought a spare thermistor and wired it in. The result was identical.
Thoughts? Ideas? I'm pretty sure I have the Nitehawk and thermistor set up correctly.
[extruder]
step_pin: nhk:gpio23
dir_pin: nhk:gpio24
enable_pin: !nhk:gpio25
heater_pin: nhk:gpio9
sensor_pin: nhk:gpio29
pullup_resistor: 2200
sensor_type: ATC Semitec 104NT-4-R025H42G`
My Voron with its nighthawk is currently printing, so it's gonna take some time until I can see how much deviation I get.
You have a spare ` at the end of your sensor_type, maybe Klipper falls back on a generic resistor?
Otherwise could the thermistor conduct some heat from the nh processor? (Maybe through the cable?)
Oh, that ` was me fighting with markdown to get the code portion of the post nicely formatted. I couldn't figure out newlines and gave up.
I don't think heat is getting to the extruder via the NH. The thermistor is potted in a m3 bung that's threaded into the extruder. The extruder itself is at ambient a few mm away.