K F

Thermaltake fan TT-12025A makes rattling noises. I have taken it apart and the fan seems to be loose from its holding. Pushing the fan in stops the rattling, however as the fan faces the ground, gravity over time must loosen the fan from the hold and the rattle begins again. The fan blades are not making a friction noise by hitting the fan guard. I think that only leaves something internal in the hold area, which I cannot see?