Hey guys,
a new problem occured. After replacing my squeeking noise making fan for another one (from a wrecked car or something) de fan runs very smooth. Until i turn the fan on position 4 (max), the fan starts vibrating like hell. I took out the fan and noticed that on the fan some metal clips were mounted, i guess for balancing the fan. Have anyone experienced the some problems? What can i do to get the fan in balance again, any tips?

I hope someone can help me