I noticed a new buzzing sound at my furnace in the basement today. I doubt I will be able to get a serviceman out here until after the holidays, thought I might get some feedback from the forum and see what I might be dealing with first. The buzzing sound is present when the unit is on of in standby waiting to come on. If I take both covers off, the sound quits (becuase the safety switch is disengaged) and as soon as I depress the switch the noise starts back. I think I have tracked it down to a transformer, and when I disconnec the power wires from the transformer the sound immediately stops. Is this something that will be a fire hazard or will it just stop working one day?
Thanks for your input and time!