Why does my automatic vents that open and close to heat zones make noise when the vents are moving (an annoying sound) as they turn. It echoes up the ductwork and scares my young kids. How can I fix that? I tried spraying WD-40 on the exposed parts.
If you've oiled them then perhaps they are just getting too old or scraping against some other parts of the duct.
Updated on January 8, 2018
By Dan Robbins