<p><strong>Yes, it is necessary.</strong></p>
<p>Its purpose is to cool the heatsink. The filament should only melt in the heater block. If the hotend fan is missing, the heatsink will also heat up, causing the filament to melt in it. This will cause heat creeps, which may result in inconsistent extrusion or unwanted clogs.</p>
<p>I once tried printing without a hotend fan and after a while, my filament got stuck at the height of the heatsink.</p>
<hr />
<p>Your heating issues are probably due to other reasons.</p>

CC BY-SA 4.0
2022-12-20T15:06:08.453Z
2022-12-21T07:49:12.190Z
2022-12-21T07:49:12.190Z
kosteklvp
<p>I have a heating problem on my Ender 3 Pro. I changed the thermistor and the 40 W heater but still the printer will just heat to 200 °C. So I unplugged the front fan that runs constantly, and, yes, now it reaches 260 °C.</p>
<p>Can I run my printer like this? I mean, it should have been mounted there for a reason?</p>

CC BY-SA 4.0
2022-12-06T17:33:55.497Z
Hi Felix and welcome to SE.3DP...
Greenonline
CC BY-SA 4.0
2022-12-27T13:23:49.707Z
If your front fan stops the entire Hot End will heat up to well above 100C. Everything plastic on it will melt. I've had that happen.
AzulShiva
<creality-ender-3><creality><cooling><fans>
Do you need the front fan on Ender 3 Pro?
Felix Wackenhuth
# Do you need the front fan on Ender 3 Pro?

(Asked by: username_0 on 2022-12-06)

I have a heating problem on my Ender 3 Pro. I changed the thermistor and the 40 W heater but still the printer will just heat to 200 °C. So I unplugged the front fan that runs constantly, and, yes, now it reaches 260 °C.

Can I run my printer like this? I mean, it should have been mounted there for a reason?

**Tags:** creality-ender-3, creality, cooling, fans
> **Comments:**
> **username_1**: Hi Felix and welcome to SE.3DP...  
> **username_2**: If your front fan stops the entire Hot End will heat up to well above 100C. Everything plastic on it will melt. I've had that happen.  

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## 1 answers

### Answer by username_3 on 2022-12-20. Score: 2

**Yes, it is necessary.**

Its purpose is to cool the heatsink. The filament should only melt in the heater block. If the hotend fan is missing, the heatsink will also heat up, causing the filament to melt in it. This will cause heat creeps, which may result in inconsistent extrusion or unwanted clogs.

I once tried printing without a hotend fan and after a while, my filament got stuck at the height of the heatsink.

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Your heating issues are probably due to other reasons.


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