Agree About Not Closing Vents
https://damienifzi339.brightsora.com/posts/how-comfort-experts-duct-repair-supports-ac-repair-in-north-fort-worth
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