FTR, i did use this method and found the line of
ductwork today with the noise and hope to get down
there this week to wrap a few towels around it or
something to keep it from whining.
the method of using the hose to move the damper/rag
down the duct was to attach the rag using duct tape
at the end and then taped it again down a bit to make
sure it would not come off easily (on a screw or
took off grating, put end of hose down a little
ways, walked over to where the resonance was most
easily heard, put down a few feet further, etc.
second duct was it, within 5ft of the grating,
which should be accessible underneath in the crawl
space once i can get down there.
i know, pretty much every project done here
involves at least three other projects along
the ways. i always have a list. i will always
have a list. even if it just for the sheer
joy of not doing anything on it at times...
ok, the 2nd trip under the house did not
take, the whine was still there but not quite
as loud and then it gradually got louder. so
today before coming in i went down there again
and moved the towels to another spot, where we
hope it will take. before they were wrapped
around the duct work and tied in place. the
new spot i just crammed them in there between
where the ductwork and the joists were to make
sure the duct was not rubbing against the joist
or the floor of the house.
much better now. third time's a charm? :)
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