Conditions for replacement:

1. The model cooling fan is not functioning, resulting in insufficient cooling for the model.
2. The fan is making an abnormal noise.

Disassembly:

1. Turn off the printer.
2. Disconnect the Type-C cable and the Teflon tube clip.

3. Lift and remove the front and top covers of the extruder.

4. Use a 1.5mm hex wrench to remove the two bolts securing the model cooling fan.

5. Disconnect the fan's signal cable.

Installation:

1. Connect the signal cable to the new model cooling fan.
2. Use a 1.5mm hex wrench to tighten the two bolts securing the new fan.
3. Reattach the front and top covers of the extruder.
4. Secure the Type-C cable and Teflon tube in their clips.
5. Turn on the printer, start printing a model, and check if the model cooling fan activates correctly after the second layer is printed.

If the above steps do not resolve the issue, please get in touch with us at us.