Perform the “Load filament” and wait until the nozzle temperature is higher than 50℃, then check whether the fan is rotating. If it does not rotate, it is a fan failure and needs to be replaced.

1.Loosen this screw with a 2mm L-wrench and open the cover. 2.Loosen these 4 screws with a 2.5mm L-wrench. 3.unplug this connector, and remove the fan. 4.Install the new fan, ensuring that this label faces inwards. 5.Plug in the connector. 6.Use the 4 screws to reinstall the entire assembly, and tighten the screws.