Buzzing furnace sound
American Standard Furnace Is always buzzing. Everything is working, just annoying sound. No clue how to stop it. Is it normal? I would love to hear possible solutions
On the chance that it is a loose lamination, find one of these
in your furnace and press on it.
Relays can also buzz but pressing on them is a bit tricky.
With a helper you can also use an empty garden hose as a stethoscope but the metal panels in furnaces can act as diaphragms and so you might do better pressing on things.
The buzz frequency may give a clue; YouTube has various sounds of various frequencies that you can use to compare.
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