# Why my 3D printing module is clogged?

### 1. The vertical side fan isn't working. 

<div align="left"><img src="https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MCeLrkXIW3BOMgAYiqM%2F-MCf7lL3sRfK0EMJVK1J%2FFan.png?alt=media&#x26;token=8adfc2f9-13c4-4202-9c75-a70bf42a9dc4" alt=""></div>

The side fan is designed to work and cool off the heatsink once it's power on. If not, it will cause the nozzle clog problem.&#x20;

If you meet this problem, please email <support@rotrics.com> to describe the problem and we will send you a replacement fan part as soon as possible.&#x20;

Or you can order a fan in the local store and replace it. The spec of the fan is:&#x20;

* Size: 30x30x10 mm
* Power: 12V 0.1A