Review on 🌬️ 2 Packs of 30mm x 30mm x 10mm 3010 12V 0.15A Ball Bearing Brushless DC Cooling Fan with 2 Pins - AB3010H12 UL TUV Certified by Zach Sornsin

I recently bought a couple of these fans to cool parts on my 3D printer. I've spent about 5 hours troubleshooting (and I'm pretty good at low voltage DC systems, often on a large scale). I can say: these fans do not work. They don't work reliably with PWM from my 3D printer, regardless of the PWM frequency. They do not work reliably at 12 VDC. They don't work reliably. When they work, it seems random: Here I see two of them connected directly to the measured 12V DC supply. One of them *sometimes* starts up and works for a while, and the other doesn't work at all. I've redone all of my connections, right down to removing the factory connectors for some simple and large crimp connections. Connections. I also replaced all of the wires, except for the wires directly connected to the fan motors, three times. Without change. you owe me money These fans aren't fans because they don't catch in series.