I am in the last stages of setting up my printer. I have to run PID tuning and then I am ready to print. When I started the auto tune on the hot end, I got an emergency halt and a message to check my thermistor as it was below min temp. I started checking the thermistor pins and changing which ones to use in the config file. As it turns our, both of my thermistors read but only when hooked to pin .24 Pins .23 .25 and .26 show zero no matter which thermistor is hooked to it. Do I have a bad board? Any help would be appreciated. This has been a long and steep learning curve. I finally got Zprobe grid running and now my heaters wont work.
I have the same issue.. out of 4 thermistor ports I am down to two. Other two are dead.
If thermistors stop working, it means you have a very very serious problem with EMI, ESD, or more commonly, a short.
Please check all of your wiring extremely carefully.
I have. I even moved the printer to another room where there are no other electronics and replaced all the wiring with shielded cables. I also have them all ran separately from the end stops and from the stepper cables.