@dc42 said in PT100 failure lesson learned:
Temperature inaccuracies when using PT100 sensors are usually caused by poor connections. Each ohm of resistance in the connections or the cable will increase the reading by about 2.5C. I have this problem on one of my owm printers at present, I can make the reading change by more than 10C by waggling the cable close to one of the connectors.
Hmm, well I swapped with my other PT100 sensor and printing was transformed back to normal? I ordered another one tonight. Once I have 3 I may mess around with them.