Identifying Issues:

1. The fan is noisy.
2. The fan is not working.
3. Frequent blockages and under-extrusion occur at the hot end.

Method of Replacement:

1. Prepare the Printer:
   1. Turn on the M5 switch.
   2. Click Control > Move on the screen to raise the Z-axis of the nozzle assembly by 200mm and move it to the middle of the X-axis for easy access.
   3. Ensure the filament has been retracted and turn off the power. Wait for the hotend to cool down.

Remove the Nozzle Assembly Covers:

• Use an H2.0 hex wrench to loosen the 4 bolts on the back of the nozzle assembly.

• Move the top cover and nozzle cover of the nozzle assembly up along the type-C cable and secure them.

Remove the Bottom Cover:

• Use an H2.0 wrench to loosen the front bottom cover bolts and remove the bottom cover.

Remove the Model Cooling Fan:

• Use the H2.0 wrench to loosen the two screws of the front model cooling fan.
• Pull out the left and right model cooling fan cables respectively, and remove the cooling fan part.

Remove the Throat Cooling Fan:

• Use an H1.5 wrench to unscrew the air guide and unplug the motor cable of the throat cooling fan.

1. Use the H2.0 wrench to loosen the three screws of the right throat cooling fan of the extruder and remove the throat cooling fan.

1. Install the New Throat Cooling Fan:
   1. Use an H2.0 wrench to insert and tighten the new throat cooling fan with 3 fixing bolts (pay attention to the direction of the fan), and plug in the throat fan power cable.
2. Reassemble the Air Guide and Model Cooling Fan:
   1. Tighten the screws of the air guide with an H1.5 wrench.
   2. Secure the model cooling fan with an H2.0 wrench.
3. Reattach the Covers:
   1. Secure the front bottom cover with an H2.0 wrench.
   2. Move the nozzle cover and top cover of the nozzle assembly down along the type-C cable and secure them.
   3. Use the H2.0 wrench to tighten the 4 screws on the back of the nozzle assembly to complete the replacement of the throat cooling fan.

If you encounter any issues or need further assistance, please contact AnkerMake customer support at us.