What should we do if the hot end is blocked?

1. Keep Good Mentality: because once you are frustrated , you may not be able to solve any problems.

2. Know Feeding Processes: Let's take broden extruder as an example: Filament tray - Extruder - Teflon tube - Hotend - Throat pipe/ heat break - Nozzle, these could help us shooting the problem quickly.

3. Basic Setting: Extruder motor and slicing parameters, if you don't know how to set then please use the default parameters.

4. Filament: check if there are phenomena, impurities, damp, dusty or large diameter error.

5. Extruder: The gear is slippery or too tight, recommended to lubricate it or replace it.

6. PTFE tube: check if the inner wall is smooth and resistant to high temperature.

7. Pneumatic Head: it is recommended to use straight through type, or pay attention to the connection during installation.

8. Throat Tube/ Head-break: If the cooling effect is poor, it melts in advance, or is blocked during the extraction process.

9. Hotend Fan: check if it is installed backwards or broken, and the cooling effect is poor, causing the filament to melt in advance.

10. Nozzle: check if it is not tightened, or residual filament blocked, and the installation is crooked.

11. Nozzle Fan: Adjust the direction, do not blow on the nozzle, because low temperature is unable to fully melt the filament and cause blockage.

Although most of blocking caused by the hotend kits, not all of them are. Before you replace it, please shoot issues according above steps.