The Ice Section Helped
https://louismxal812.halcyonledger.com/posts/attic-heat-and-ductwork-problems-behind-ac-repair-in-north-fort-worth-explained-by-comfort-experts-3
The Ice Section Helped The section on frozen coils helped. Ours iced over on a Sunday and my first instinct was to crank the thermostat lower. Glad I read this first. Turned it off, let it thaw, changed a very gray filter and it's been cooling normally