Also, Rody don't forget, when the PSU starts up, it will most definitely spin the fan up, the bootup power draw is usually high. Also, the PSU would prefer to spin it very slowly rather than shut it off completely. It's detrimental to PSU lifespan considerably. A bit of airflow matters greatly to temperatures, and the PSU uses simple heatsinks. The fanless PSUs, which were fashionable a few years ago, are not too common now, since nowadays PSUs are so efficient that cooling them is easier, and thus fans are spun slower, and lower noise.AvoK95 wrotethey said that to me too, it's complete rubbish because my PSU was getting REALLY HOT and from the heat there was a certain smell and the fan still wouldn't turn , i tried to manually turn it but it still didn't work
when i RMA-d it they stick to what they said and charged me for the shipping
ever since i got it back the fan never stops and the PSU is cool now
Rody, if you have some PSUs with defective fans, then it's either the fan power supplier, or the fans themselves. Why don't you open the PSU (if it's not under warranty anymore), and replace the fan, and try to see if it works.