Breaker Panel Buzzing


Old 01-31-07, 09:33 AM
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Breaker Panel Buzzing

When my heat pump comes on the breaker panel in the house begins to hum. Is there something that I can do to stop this. At night it is loud enough to be annoying. Is there any danger associated with this?
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Old 01-31-07, 09:40 AM
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Humming is the sound of a loose breaker or a loose wire. Mild humming when the breaker is under heavy load is usually safe and sometimes unavoidable. More severe humming could be a sign of a significant problem. Perhaps the breaker isn't fully seated. Perhaps the breaker is not exactly the correct one for the panel. Perhaps a connection is not tight.

Here's an experiement that you can try fairly safely. Next time it is humming, push down on the breaker with your fingers. If it stops humming, it's probably a loose breaker. You may be able to reduce the noise by installing a new breaker.

If the humming does not stop, it's probably a loose connection.

Working inside the panel, either to replace a breaker or to tighten a loose connection, is pretty dangerous, and should not be attempted unless you have significant electrical experience.
Old 01-31-07, 11:19 AM
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Does it buzz just for a few seconds when the heat pump starts up or does it buzz for the entire cycle the heat pump runs? Has it always done this or is it something new?
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