Tutorial: How to replace the CPU cooling fan in an Intel NUC7 or NUC5

Tutorial: How to replace the CPU cooling fan in an Intel NUC7 or NUC5

Here's a step-by-step tutorial on how to replace the CPU cooling fan in an Intel NUC7 or NUC5 using compatible fan models like:

This guide applies to most Intel NUC5i5RYK, NUC5i3RYK, NUC7i5BNH, NUC7i3BNH, etc., but exact layouts might vary slightly. Be gentle and patient during disassembly.

🔧 Tools You’ll Need

  • Precision screwdriver set (Phillips #0 and #1)

  • Plastic pry tool or spudger

  • ESD wrist strap (optional but recommended)

  • New replacement fan (one of the compatible models)

  • Thermal paste (optional, only if heatsink is removed)

⚠️ Precautions

  • Unplug the NUC and let it cool down.

  • Discharge static electricity before handling internal parts.

🛠️ Step-by-Step Fan Replacement Guide

 

 

1. Remove the Bottom Cover

  • Flip the NUC upside down.

  • Unscrew the 4 screws at the corners (they usually stay attached to the bottom cover).

  • Lift off the bottom panel carefully.

2. Remove the Internal Components

Depending on your NUC model, you may need to:

  • Remove the RAM and SSD (M.2 or SATA) to gain better access.

  • Unplug the Wi-Fi antenna cables if they obstruct the board.

Take photos of the layout before removing parts, to help with reassembly.

 

3. Remove the Motherboard

  • Unscrew all visible motherboard screws.

  • Carefully disconnect all cables connected to the board (e.g., power, audio, fan).

  • Lift out the motherboard gently—some NUCs require lifting at an angle.

4. Access the Cooling Assembly

  • On the underside of the motherboard, locate the fan/heatsink assembly.

  • The fan is usually attached via 3 or 4 screws and has a small 4-pin connector to the motherboard.

5. Disconnect and Replace the Fan

  • Disconnect the fan cable from the motherboard.

  • Unscrew the fan from the heatsink or chassis bracket.

  • Replace it with your new fan (BSB05505HP CT02 or equivalent).

  • Make sure the connector matches (4-pin) and orientation is correct.

If your new fan does not come with thermal paste and you removed the heatsink, clean off old paste and apply a pea-sized amount of new thermal paste on the CPU.

 

6. Reassemble Everything

  • Reconnect the fan cable.

  • Reinstall the motherboard, RAM, SSD, and any other parts you removed.

  • Double-check all connectors are seated properly.

  • Reattach the bottom panel and screws.

7. Power Up & Test

  • Power on the NUC and ensure the fan spins normally.

  • Enter BIOS if needed (F2 on boot) to check fan speed/temp.

  • Monitor system temps for a while during use to make sure cooling is effective.

✅ Compatible Fan Notes

All the following fans have similar specs:

Always confirm dimensions (~5.5 cm x 5.5 cm x 1.5 cm) and connector type before purchasing.

 

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