# Filament Jam/Clog

![Image from Simplify3D](/files/-MS_Eu7gzx3T3ISbH0bX)

A filament clog/jam can happen and this will prevent consistent extrusion at best and completely block plastic from extruding at worst. It can happen due to multiple reasons.

**This article covers in detail filament jams and clogs and how to deal with them:**

{% embed url="<https://help.prusa3d.com/en/article/clogged-nozzle-hotend-mk3s-mk2-5s_2008>" %}
Clogged nozzle
{% endembed %}

**Heat creep is a phenomenon where the filament path before the melting zone heats up more than it should. This tends to make the filament expand too much and cause a clog. Read more about it here:**

{% embed url="<https://help.prusa3d.com/en/article/extrusion-stopped-mid-print-heat-creep_1948>" %}
Heat creep causing clogs
{% endembed %}


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