I have a hunter ceiling fan that's close to 30 years old. It has 3 speeds and works fine at the highest speed but makes a loud buzzing sound while spinning in low or medium. The pitch of the buzz is noticeably different at medium and low.
The fan has the same problem in reverse turning -- fine at high / same buzz sounds at medium and low. And same pitch of buzz at medium and low.
Any idea what the problem is and if it can be fixed easily?
ps. no light on this fan. No dimmer switch. Operated by remote control.