This step-by-step guide shows how to replace the CPU cooling fan in your HP Pavilion 15-CS, 15-CW. Set aside some time, work on a clean surface and check the part number first.
โ View the replacement part: L23895-001, L25585-001
Symptoms that point to this part
- Loud grinding, rattling or clicking noise
- The laptop gets very hot or slows down under load
- Fan error at boot, or a fan that no longer spins
- Sudden shutdowns during demanding tasks
Compatible models
- HP Pavilion 15-CS, 15-CW
Part number: L23895-001, L25585-001
Laptops with the same model name can have different internal versions. Compare the part number and connector on your old part with the product photos before ordering.
โ ๏ธ Before you start
This repair involves opening your laptop and may void any remaining manufacturer warranty. Screw positions and access differ between versions, so follow your model's service manual where it differs from this guide. Proceed only if you are comfortable working with static-sensitive electronics.
๐งฐ Tools and materials
- Phillips screwdriver (PH0 or PH1)
- Plastic spudger or opening pick
- Thermal paste and isopropyl alcohol, if the heatsink must be removed
- Replacement CPU cooling fan: L23895-001, L25585-001
- Anti-static wrist strap (recommended)
๐ 1. Power off and unplug
- Shut the laptop down completely.
- Disconnect the charger and all connected devices.
- Hold the power button for a few seconds to discharge remaining power.
๐ฆ 2. Remove the bottom cover
- Place the laptop upside down on a soft surface.
- Remove all screws from the bottom panel. Some may be hidden under rubber feet.
- Release the cover carefully with a plastic tool.
๐ง 3. Disconnect and remove the old fan
- Locate the fan next to the copper heatsink.
- Unplug its connector from the motherboard, pulling on the plastic connector and not on the wires.
- Remove the fan screws and lift the fan out.
๐ง 4. Install the new fan
- Blow dust out of the heatsink fins while the fan is out.
- Compare the new fan with the old one: same connector, same mounting holes.
- Fit the new fan, tighten the screws and plug in the connector.
๐งฉ 5. Reassemble the laptop
- Fit the bottom cover back and tighten all screws.
- Reconnect anything you removed.
โ๏ธ 6. Test the repair
- Connect the charger and power on the laptop.
- Check that the fan spins up under load and that temperatures drop.
Frequently asked questions
How do I know this part fits my laptop?
Match the part number printed on your old part and compare the product photos. The model name alone is not always enough.
Do I need new thermal paste?
Only if you remove the heatsink from the processor. If you take out just the fan, the paste stays undisturbed.
๐ Done!
Your HP Pavilion 15-CS, 15-CW should be working properly again. Need the part? Order the CPU cooling fan here. It comes with a 6-month warranty.