Good day and thanks for looking at this post. Furnace works great. No excessive dust, house temp in rooms is even, no jump in heating bill. Clean filter. Clean return air grate. Asked hubby to call tech to get system checked out. Technician checked it out and said all is well, but we neglected to ask him to investigate buzz. Buzz sound comes from air return when furnace kicks into high gear. Any recommendations?
source https://hvac-talk.com/vbb/threads/2227376-Buzz-coming-from-air-return?goto=newpost
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