Kobra S1 - How to replace hotend/heat sink fan

Maintaining proper cooling on your Anycubic Kobra S1 is essential for consistent print quality and preventing heat-related issues like extruder jams or thermal errors. This guide walks you through replacing the hotend cooling fan (also known as the heat sink fan) on your Kobra S1 CoreXY printer . Using basic tools, primarily a S2.0 and S2.5 Allen key, you'll learn how to safely remove the print head covers, disconnect the fan wiring, install the new genuine Anycubic replacement fan, and properly route the cables before reassembly . Always power off and unplug your printer before starting any maintenance.

TABLE OF CONTENTS

• Spare Part Referenced:
• Written Install Guide:
  • 1. Tools:
  • 2. Disassembly steps:
    • Step 1: Remove the outer shell
    • Step 2: Remove the hot end cooling fan
  • 3.Installation steps:
    • Step 1: Install the hot end fan
    • Step 2: Install the wiring harness
    • Step 3: Install the print head housing

Spare Part Referenced:

Hotend 2510 Fan for Anycubic Kobra S1

Written Install Guide:

Source: https://wiki.anycubic.com/en/fdm-3d-printer/kobra-s1-combo/hotend-cooling-fan-replacement-guide

Replacing the hot end cooling fan requires power off

1. Tools:

• S2.0 Allen key*1
• S2.5 Allen key*1

2. Disassembly steps:

Step 1: Remove the outer shell

1. Pull outward to remove the print head front cover and remove the fan plug at the same time.

2.Use an S2.0 Allen key to unscrew the fixing screws of the rear housing of the print head.

Step 2: Remove the hot end cooling fan

1.Remove the hot end fan harness plug.

2.Remove the wiring harness from the buckle.

3.Use an S2.0 Allen key to unscrew the hot end cooling fan fixing screws.

3.Installation steps:

Step 1: Install the hot end fan

1. Use an S2.0 Allen key to tighten the hot end cooling fan fixing screws.

Step 2: Install the wiring harness

1. Insert the cable into the slot.

2. Insert the hot end fan harness plug into the print head main board

Step 3: Install the print head housing

1.Use an S2.0 Allen key to tighten the fixing screws of the rear housing of the print head.

2.Align and plug in the model cooling fan harness head.

3.Tighten the print head housing inwards to ensure that the housing is not loose.