My printer got done running a 15-16 hour job and after setting turned off for a few hours I turned it back on to start another but my T1 thermistor is reading 644-691. I thought my thermistor went bad so I was going to swap it out but then decided to just use the other extruder instead so I unplugged the T1 thermistor and turned the smoothie back on and it is still reading those numbers. I checked the others and when unplugged the others read 999 as they usually do when there is nothing plugged into them.
I flashed the firmware again to see if that would fix. Nope. Checking the voltage across the pins and reads 0.00v, the others read 3.27v.