Agree About Not Closing Vents
https://messiahhwsf818.summitviewdaily.com/posts/what-you-can-fix-yourself-and-when-north-fort-worth-ac-repair-needs-comfort-experts
Agree About Not Closing Vents Agree with the point about not closing too many vents. I used to shut them in the guest rooms to cut energy use, and the system started whistling and running longer. Opened them back up and things calmed down