Agree About Not Closing Vents
https://lukaseolt009.swiftnestly.com/posts/storm-and-power-outage-advice-from-comfort-experts-for-ac-repair-in-north-fort-worth-neighborhoods
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