Since it's 2.5 years old I'm not sure what firmware you have on it or if you have upgraded it.
If you haven't gotten a thermal runaway error...watch the hotend temp during the next print.
If it fluctuates at all, then it's most likely the thermistor.
Since it's 2.5 years old I'm not sure what firmware you have on it or if you have upgraded it.
If you haven't gotten a thermal runaway error...watch the hotend temp during the next print.
If it fluctuates at all, then it's most likely the thermistor.