Duct noise during heat cycle

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Old 04-25-18, 02:47 PM
J
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Duct noise during heat cycle

I have a duct that ticks during the heating season. It is a small <6" round duct feeding a basement register. As the ducts warm up and cool down, it will tick. Of course, the duct run is in a finished ceiling so access is limited. If I press where the run meets the main trunk feed, it will sometimes stop for a while but will come back after an hour or two. It does not tick during the cooling season so my guess is its some slight expansion.

The house has seal sealer applied to all the joints and connections so the whole system is as tight as a drum. Any ideas what to try or how to attack making this go away?

I have a drywall project going in the house so if I need to open up the ceiling I can but would prefer to avoid that.
 
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Old 04-25-18, 04:17 PM
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Probably rubbing on something as the metal heats up, my septic drain pipe in the basement used to make all kinds of noise when hot water from a shower/tub was drained, had to put strips of plastic on all the metal hangers so the pipe could slide as it expanded.
 
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