Is a Buzzing Furnace Dangerous? (What It Means)
A furnace should make a low, steady sound when it runs. When you hear a buzzing noise instead, it can be alarming. A buzzing sound can sometimes indicate dangerous malfunctions. This includes an electrical issue or a component that is starting to fail. If the sound is loud or sudden, you notice a burning or gas smell, see sparks, your carbon monoxide alarm goes off, or your breaker trips, shut the system off. Call a professional right away. When Furnace Noises Are Normal vs. a Warning Sign Most furnaces make some noise. You may hear
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