<p>It turns out this was the beginning of the hot end thermistor failing. I took the opportunity to upgrade to an all metal hot end. That was the start of a nightmare that lead to the failure of my mainboard. But it is working now and no temp issues after several months and many prints.</p>

CC BY-SA 4.0
2024-07-25T19:41:47.480Z
How did switching to an all metal hot end contribute to the failure of your mainboard? I'm at a similar point facing endless thermal runaway issues and I'm considering upgrading.
user84207
CC BY-SA 4.0
2023-03-01T17:57:24.730Z
2023-03-01T17:57:24.730Z
scott lafoy
<p>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?</p>
<p><a href="https://i.sstatic.net/2mZ3f.jpg" rel="nofollow noreferrer" title="Screenshot of OctoPrint's temperature graph"><img src="https://i.sstatic.net/2mZ3f.jpg" alt="Screenshot of OctoPrint's temperature graph" title="Screenshot of OctoPrint's temperature graph" /></a></p>
<p>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?</p>

CC BY-SA 4.0
2022-12-20T18:09:56.967Z
Have you solver this issue yet? Have you checked for loose hotend thermistor?
kosteklvp
<creality-ender-3><temperature><thermal-runaway>
Ender 3 v2 temp fluctuations every 10 minutes or so
scott lafoy
# Ender 3 v2 temp fluctuations every 10 minutes or so

(Asked by: username_0 on 2022-11-06)

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?

[![Screenshot of OctoPrint's temperature graph](https://i.sstatic.net/2mZ3f.jpg "Screenshot of OctoPrint's temperature graph")](https://i.sstatic.net/2mZ3f.jpg "Screenshot of OctoPrint's temperature graph")

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?

**Tags:** creality-ender-3, temperature, thermal-runaway

> **Comments:**
> **username_1**: Have you solver this issue yet? Have you checked for loose hotend thermistor?  

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## 1 answers

### Answer by username_0 on 2023-03-01. Score: 1

It turns out this was the beginning of the hot end thermistor failing. I took the opportunity to upgrade to an all metal hot end. That was the start of a nightmare that lead to the failure of my mainboard. But it is working now and no temp issues after several months and many prints.

> **Comments:**
> **username_2**: How did switching to an all metal hot end contribute to the failure of your mainboard? I'm at a similar point facing endless thermal runaway issues and I'm considering upgrading.  

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