I guess a better title would be "how to adjust damper in finished garge ductwork"
The registers in the upper level of my split level house blow very little air.
While they are blowing and for a few minutes afterwards I can hear a slight clanging sound.
A friend suggested that there could be a damper that is stuck.
He suggested that I cut a hole in the sheetrock and shine a light to see if I can see a damper in the heat run
He doesn't give very good explanations and can't come over to help.
I can't picture what he is talking about.
My garage has a long area of ductwork that is sheetrocked. I cut a small hole in the sheetrock but I can't figure out how to look inside. Is there an open area in the ductwork or something that would allow me to see inside?
I'm also not sure what he means by "heat run".
Thank you for any suggestions or help.