Agree About Not Closing Vents
https://shanefadk435.inkharbory.com/posts/comfort-experts-on-frozen-ac-repair-in-north-fort-worth-and-what-to-do-first-5
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