Extruder and bed heaters turn off shortly after printing starts
Manually I have had the extruder and heater both on up to temperature 140 and 55 respectively. But when printing either from warm condition after starting print or starting from cold and waiting after printing begins the extruder and heater are turned off. The message that they were turned off because the temperature dropped happens about 13 seconds after the temperature dropped on the extruder. That tells me why it would have turned them off but obviously not what turned them off before the temperature started to drop. How do I go about troubleshooting what causes the temperature drop on the extruder that then causes the message that comes too late?