Just one.. In the morning while it is still cool go topside (up on the roof) with #2 Phillips head screwdriver
Remove the cover
Remove the cover over the condenser (hot) coils
Inspect..they may need cleaning..
And second idea:
Proper operation means that you take 4 temp measurements and two humidity measurements. Then you go to a book published by the unit's manufacturer and look up some of those measurements.. Finaly you get to a chart where you plot the last 2 readings.
If the dot is below the line.. That is good.
EVEN if it's blowing out at 80 degrees.. If the dot is below the line that is working properly
Outside temp is PART of what determines which line to look at or which chart to plot on. IF it gets high enough and you are in direct sunlight... The line gets higher and higher.