The central air can only keep up to a certain percentage vs the outside temp.
When it’s not 90+ for 3-5 days in a row generally the house temp lowers to the set temp. It’s impossible to do that right now.
I’ve resorted to lowering it way down at like 6am so at least the house stays below 80 at the hottest part of the day.
did you clean the coils on the compressor?
is it in the sun?
do all the things? (close shades - close doors/vents in empty rooms)
what is the temp of the air coming out of the registers?
I may become a believer in the window hanging mini-split......




