Best posts made by silveroranges

@chrishamm I appreciate the help, it worked fantastic!

So, last night while in the middle of another large print, my Temp2 input started having the same issue. It reads -11c now at ambient temp. I am using a different PT1000 sensor than when it originally happened.

I was thinking, and my only possible explanations I could come up with are;

A. The longer run of cable for the PT1000 is drawing too much current to check for resistance of the thermocouple, and causing a resistor somewhere on the board to burn up (but then it would be open circuit, so idk)

B. A resistor somewhere is being damaged by the inductive current induced from the 100w heater cables ran next to the temp sensor. The new wiring harness has all of the cables bundled tightly together.

Either way I am going to troubleshoot it later today, and in the meantime I am ordering the PT100 daughter board, so that way if the problem keeps happening I don't damage another temperature input. I am hoping I can find a faulty resistor somewhere on the board and just solder a new one on.

Another odd thing that has been happening that I am beginning to suspect may be a related issue is that my BLTouch will deploy while printing. This is what is making me suspect an inductive current being the problem, maybe weird voltage spikes are causing the BLTouch to deploy, and damage the temperature sensors. Either way the issue obviously is caused by my new wiring harness, so I guess I get to take it all apart (yay )