I did something silly. The PLA filament installed in my 3D printer broke off flush with the top of the extruder requiring me to remove the cooling fan to pull the filament out.
That is not the silly part, the silly part was doing this while the extruder cooling fan was running. I slipped and sent a screwdriver through the fan breaking off one of the fan blades. This quick article is about replacing the extruder cooling fan with a Noctua NF-A4x10 FLX 40x10mm fan.
I chose the Noctua fan over a cheaper alternative in hopes that spending a bit more money will get me a long life fan and more air flow. Plus I like the look so that is worth a few extra dollars. The fan while the correct size will need some modifications to the wiring harness to connect it to the 3D printer.
The fan comes with heavy stiff sheathing covering the wiring harness, extension, and 3 pin to 2 pin adapter. I prefer a light flexible wiring harness so I will be removing the cable sheathing. The extension is not long enough to reach the fan header so I will be crimping on a new connector to enable it to be easily plugged into the wiring harness currently on the printer.
This is a worthwhile upgrade if like me your extruder cooling fan has broken. Otherwise I doubt there will be any noticeable performance improvements. The fan is quieter so I like that, now to silence the power supply fan. Thanks for reading.