Ender 3 Fan Cooling mod

thingiverse

Here's a modified print head cooling fan mod that allows you to rotate the fan to blow hot air out in front while keeping the radiator cool. This design enables me to feel the area under the nozzle is cold even when preheating for PLA. After making this modification, I can notice a significant difference - the area under the nozzle feels noticeably cooler than before. To secure it in place, simply use an M3 screw as shown in the image. Edit: I've added Version 4 of the design with improved airflow using a fillet instead of a chamfer. This should result in better performance. Note: For optimal results, I recommend using PETG or ABS materials for printing.