My FT-5 R2 has a 5050 radial fan for part cooling. Today I had my third 5050 fan die, with less than 20 hours of print time on it. I've checked the fan terminal on the board, and it reads 0V when off and 24V when on, so I'm unsure what would be causing this problem.
The fans work fine for a while, and then they start slowing down, eventually not moving at all. At that point, the resistance is in the mega-ohm range, meaning it's shot.
Any thoughts are appreciated.