<p>Thermal runaway occurs when the hotend is on, but the sensor does not pickup any temperature increase. In many cases the thermistor is broken or the connection is bad.
A friend of mine had the thermistor broken on his Ender 3 pro. It worked sometimes and sometimes not. Buy a new thermistor.(a few $ only) and replace it to be sure.</p>

CC BY-SA 4.0
2022-02-22T11:42:57.663Z
2022-02-22T11:42:57.663Z
Hacky
<p>I just assembled my Ender 3 last night, this is my first printer and I’m new to this all. After about 10-15 minutes into printing it consistently gives me a thermal runaway error. Any help would be appreciated.</p>
<p>The (part cooling) fan is spinning.</p>

CC BY-SA 4.0
2022-02-19T22:42:32.070Z
Photo of the machine please?
Trish
<creality-ender-3><thermal-runaway>
New Ender 3 Pro Thermal Runaway
John Gaud
# New Ender 3 Pro Thermal Runaway

(Asked by: username_0 on 2022-02-19)

I just assembled my Ender 3 last night, this is my first printer and I’m new to this all. After about 10-15 minutes into printing it consistently gives me a thermal runaway error. Any help would be appreciated.

The (part cooling) fan is spinning.

**Tags:** creality-ender-3, thermal-runaway
> **Comments:**
> **username_1**: Photo of the machine please?  

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## 1 answers

### Answer by username_2 on 2022-02-22. Score: 1

Thermal runaway occurs when the hotend is on, but the sensor does not pickup any temperature increase. In many cases the thermistor is broken or the connection is bad.
A friend of mine had the thermistor broken on his Ender 3 pro. It worked sometimes and sometimes not. Buy a new thermistor.(a few $ only) and replace it to be sure.


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