--- title: How to change the cooler fan (Epsilon series) description: In this article you will learn how to safely replace the cooler fan --- [Skip to content](https://support.bcn3d.com/knowledge/change-cooler-fan-bcn3d-epsilon-series#main-content) - [English](https://support.bcn3d.com/knowledge/change-cooler-fan-bcn3d-epsilon-series) - [Deutsch](https://support.bcn3d.com/de/knowledge/change-cooler-fan-bcn3d-epsilon-series) - [Español](https://support.bcn3d.com/es/knowledge/change-cooler-fan-bcn3d-epsilon-series) - [Français](https://support.bcn3d.com/fr/knowledge/change-cooler-fan-bcn3d-epsilon-series) - [Italiano](https://support.bcn3d.com/it/knowledge/change-cooler-fan-bcn3d-epsilon-series) English Show submenu for translations [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new?hsLang=en) [Customer portal](https://support.bcn3d.com/repair-service?hsLang=en) ![knowledge-base-header-bcn3d-logo.png\]](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Header/knowledge-base-header-bcn3d-logo.png?height=40&name=knowledge-base-header-bcn3d-logo.png) - [Default HubSpot Blog](https://blog.bcn3d.com/) Open main navigation Close main navigation - [Default HubSpot Blog](https://blog.bcn3d.com/) - - [English](https://support.bcn3d.com/knowledge/change-cooler-fan-bcn3d-epsilon-series) - [Deutsch](https://support.bcn3d.com/de/knowledge/change-cooler-fan-bcn3d-epsilon-series) - [Español](https://support.bcn3d.com/es/knowledge/change-cooler-fan-bcn3d-epsilon-series) - [Français](https://support.bcn3d.com/fr/knowledge/change-cooler-fan-bcn3d-epsilon-series) - [Italiano](https://support.bcn3d.com/it/knowledge/change-cooler-fan-bcn3d-epsilon-series) English Show submenu for translations - [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new) - [Customer portal](https://support.bcn3d.com/repair-service) - [BCN3D forum](https://www.bcn3d.com/community/) [BCN3D forum](https://www.bcn3d.com/community/) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge base - BCN3D](https://support.bcn3d.com/knowledge?hsLang=en) 2. [Epsilon Series](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en) 3. [Troubleshooting](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#troubleshooting) # How to change the cooler fan (Epsilon series) ## In this article you will learn how to safely replace the cooler fan   --- |                                                                                                                                | [**EN**](https://support.bcn3d.com/knowledge/change-cooler-fan-bcn3d-epsilon-series) | [**DE**](https://support.bcn3d.com/de/knowledge/change-cooler-fan-bcn3d-epsilon-series?hsLang=en) | [**IT**](https://support.bcn3d.com/it/knowledge/change-cooler-fan-bcn3d-epsilon-series?hsLang=en) | [**ES**](https://support.bcn3d.com/es/knowledge/change-cooler-fan-bcn3d-epsilon-series?hsLang=en) | [**FR**](https://support.bcn3d.com/fr/knowledge/change-cooler-fan-bcn3d-epsilon-series?hsLang=en) | | --- | --- | --- | --- | --- | --- | ---   If you [confirm that the issue is the cooler fan](https://support.bcn3d.com/knowledge/check-operation-cooler-fan-bcn3d-epsilon-series?hsLang=en), you can replace it with a new unit - **Warning!** Be careful when handling the connection cover as the cables underneath may be damaged. If the last 4 digits of your printer serial number are **higher than 0771 for Epsilon W50** or **0498 for Epsilon W27**, you should consider the following: - **Warning!** The piezo cable is extremely sensitive, use caution when handling it. ![cable-piezo-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Extruder%20board/cable-piezo-1.png?width=688&name=cable-piezo-1.png) - Below is the placement of the connections of the main components  ![extruder-board-piezo-connections](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Extruder%20board/Hotend.png?width=688&name=Hotend.png)   | **Parts** | | Buy these parts | | --- | --- | --- | | ![cooler-fan-bcn3d](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Components/cooler-fan-bcn3d.png?width=329&name=cooler-fan-bcn3d.png) | Extruder cooler fan - Epsilon | [SKU 11034 ](https://www.bcn3d.com/product/cooler-fan/) | | **Send us your comments about this article** | [![feedback-button](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Button/feedback-button.png?width=179&name=feedback-button.png)](https://share.hsforms.com/1F7t1sBuOQyWlAeRwwFSjgQ3fec5) | | --- | --- | |   **RELATED ARTICLES** | | | ![check cooler fan eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/check%20cooler%20fan%20eng.png?width=600&name=check%20cooler%20fan%20eng.png) | [![replace extruder board eng](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Related%20Articles%20English/replace%20extruder%20board%20eng.png?width=341&name=replace%20extruder%20board%20eng.png)](https://support.bcn3d.com/knowledge/change-extruder-board-bcn3d-epsilon-series?hsLang=en) | |   |   | | --- | --- | - 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