I have a 3 bulb light fixture in my kitchen and for 4 years it was on a dimmer switch and everything worked fine. Not knowing about the incompatibility of dimmer switches and regular CFLs, I installed regular CFLs into the fixture and it started to produce an electrical buzzing noise. I could not turn this noise off when the switch was off. I removed all of the bulbs and that still did not fix the noise. I then learned about not using CFLs with dimmer switches, so I replaced the dimmer switch with a normal ON/OFF wall switch. It fixed the problem for awhile, but now the buzz is back again. Turning the wall switch off and/or removing all of the CFL bulbs does not stop the buzz. If I switch the power off at the circuit breaker, the buzz will stop, but it comes back when I turn the power back on at the breaker. It seems to me that the wall switch is bad again. If so, what kind of switch do I need to work with CFLs? If the switch could be ok, does anyone have any ideas what might be causing this problem? Thanks!
There is something else on the circuit causing the buzz.
A buzz could be from a loose connection arcing but that would only buzz when power was going through it.
A door bell transformer could be buzzing.
A bad switch would buzz at the switch not at the fixture.