Hello. I have an Ultimaker Original Plus. A while back, my printer head fan was not functioning so I ordered two new replacements just in case. Plugged both in, and neither worked. Made sure to get the exact 24VDC replacements. The interesting thing about the fans is that they will run if you move the prop yourself, but it will not provide adequate cooling at the speed it maintains. It also will not initiate the fan to spin. I checked the connector on the board, and the output is correct when th