We have an I3v Prusa 3D printer; been using it about 6 months. Recently a new problem cropped up – the thermistor temperature is reading 50 degrees higher than the hot end actually is. When the LCD reads 200 degrees C the hot end is actually 155, as shown by 2 meat thermometers. We have tried 2 thermistors and 2 heating elements with no change so we know those components are OK. Before this tby Connected Training - Controllers