<blockquote>
<ul>
<li>What is causing this noise?</li>
<li>Can it be fixed without replacing the fan?</li>
<li>If so, how?</li>
</ul>
</blockquote>
<p>The sound was caused by a buildup of filament near the motherboard and in the motherboard fan. After getting rid of the strands, the part cooling fan has stopped making the buzzing noise.</p>

CC BY-SA 4.0
2023-08-16T10:26:51.150Z
2023-08-16T10:26:51.150Z
DerFern
<p>I am using an Ender 3 Pro that I bought near the end of March 2023, and I have not modified any of its parts. About an hour ago, I tried preheating the hotend (using the 'Preheat PLA End' setting) and heard a buzzing sound coming from the parts cooling fan.<br />
I tried cleaning the fan and made sure it was connected properly, which made the noise a bit quieter but didn't make it go away.</p>
<ul>
<li>What is causing this noise?</li>
<li>Can it be fixed without replacing the fan?</li>
<li>If so, how?</li>
</ul>
<p>I will keep trying to understand and fix the problem, and will add updates if I find more info.</p>

<creality-ender-3><print-fan>
Ender 3 Pro: Parts cooling fan making strange noises
DerFern
# Ender 3 Pro: Parts cooling fan making strange noises

(Asked by: username_0 on 2023-08-13)

I am using an Ender 3 Pro that I bought near the end of March 2023, and I have not modified any of its parts. About an hour ago, I tried preheating the hotend (using the 'Preheat PLA End' setting) and heard a buzzing sound coming from the parts cooling fan.  
I tried cleaning the fan and made sure it was connected properly, which made the noise a bit quieter but didn't make it go away.

* What is causing this noise?
* Can it be fixed without replacing the fan?
* If so, how?

I will keep trying to understand and fix the problem, and will add updates if I find more info.

**Tags:** creality-ender-3, print-fan

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## 1 answers

### Answer by username_0 on 2023-08-16. Score: 3 | Accepted answer

> * What is causing this noise?
> * Can it be fixed without replacing the fan?
> * If so, how?

The sound was caused by a buildup of filament near the motherboard and in the motherboard fan. After getting rid of the strands, the part cooling fan has stopped making the buzzing noise.


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