ramps 1.4 - How to configure Marlin to enable auto-fans with dual extruder - 3D Printing Stack Exchange
Adding Parts Cooling Fan to Your 3D Printer : 3 Steps (with Pictures) - Instructables
BUG]Part Cooling Fan not Running - after clicking on Menu it starts with 100%, not adjustable - SKR Mini E3 V2 · Issue #20670 · MarlinFirmware/Marlin · GitHub
3 ROW RADIATOR+SHROUD FAN fit 68-74 69 AMC JAVELIN/AMX/RAMBLER/MARLIN/REBEL/SST | eBay
Adding Parts Cooling Fan to Your 3D Printer : 3 Steps (with Pictures) - Instructables