Question about Heating & Cooling
What is the electrical buzzing sound coming from my Lenox furnace? Does it mean anything?
What you hear is the trnasformer that cuts the voltage from 120 to 24v for the thermostat and the furnace control system. Dpending on the frequency of the house current somedays it may hum louder than other days. This is nothing to be concerned about but can get annoying sometimes if your furnace is where you can hear it easily. I have not found and quick cure for it so unfortunately you will have to just deal with it.
Posted on Nov 16, 2009
Testimonial: "Thank you so much! I just bought this 8 yr old house in July so everything here is new to me. I can live with noise that isn't dangerous."
If this noise is comming from your control transformer or possibly a control relay you may be able to isolate it from the metal housing it is secured to with a rubber mount. Some times the noise resonates and is amplified by the screws or bolts used to secure it in place. If it is a contactor makeing the noise it may be losing its magnetic capability due to rust on its solinoid iron core.
Posted on Nov 24, 2009
Testimonial: "Thank you very much. This house came with a one year homeowners warranty so it may be well to get this checked out while it's still covered."
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Posted on Jan 02, 2017
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