Questions & Answers for: Holmes Products buzzing mixer

my oil filled heater is making a buzzing noise every 15 minutes or so what wrong with it? older heater but has worked great and just started making a buzzing or beeping noise every 15 minutes or so ...

samson sound system in a church has a continuous hum. Speakers are not routed around fluorescent lights or power lines. It is plugged into a UPS, grounds are good. Also hums when plugged into wall ...