I have an Ender 3 v2 that will fluctuate the hotend temperature every 10 minutes or so and eventually causing thermal runaway. I have tried the PID auto-tune a few times and it seems to solve it for a couple of days. Any idea what’s going on?
Today I ran the PID auto-tune again a few times trying to figure out the issue. Now when I heat the hotend to 220 °C it holds perfectly for about 15 minutes then drops and goes into thermal runaway shutdown. I heated the hotend while the printer was not printing to eliminate a bad electrical connection as the issue. Is this maybe a thermistor issue?
