crwdns2934241:0crwdne2934241:0 Frank Hutchings

crwdns2934249:0crwdne2934249:0:

Dirt.  You need to clean and lubricate the motor bearings.  Try the front one first, just behind the fan blades.  WD-40 may work for a while, but the best fix is to disassemble and clean the bearings well.

crwdns2915684:0crwdne2915684:0:

open