Selftest and calibration errors following bed thermistor replacement
I hope you guys can help me out troubleshooting these errors that I am having after I replaced the bed thermistor. I've been getting the thermal runaway error for my bed recently, and after researching it a bit, bought a bed thermistor kit and replaced the original 5 year old thermistor. Unfortunately, I was still getting the error after I did the straightforward thermistor replacement. Like the user themaninthesuitcase, my bed power connector cover was also melted, and found corrosion at the connector pads. I cleaned off the corrosion at the pads and cable connectors, put it back together and haven't had a runaway error since, even after a 12 hour print. However, the 12 hour print that I made had very poor cohesion to the bed, so I did a calibration on the printer. That was a mistake...
The selftest calibration failed, saying the hotend thermistor, not the bed thermistor was bad. I then did a PID on the hotend, and it went through the PID calibration like a champ, so I don't see how there could be a hotend thermistor problem. Deciding to power through to a bed calibration, I did the XYZ calibration test and was then going to do a bed mesh leveling. When the PINDA probe was attempting to find the four corners of the bed, it failed. I regapped the PINDA to the bed, thinking it might have been a little high, and it was, by about 1-2mm. Unfortunately, the XYZ calibration kept having the same error. I don't know if there was something that I did with the bed removal and the repairs that I performed on the bed that caused both of these problems or not. I'm not sure what to look for next. Any advise would be much appreciated.