Give it a bath (Epically clean the roof) made a big differnece on my Inruder
Block windows (Reflectx) Close blinds as well
Now; On my Inruder one of the Carrir Air V's died of manfucturing defect,, Of course Carrir no longer makes RV units so I replaced it with a Advent Air. (Just the upper unit, this means no additional wiring needed, Same controls and such, from inside NO difference, Only difference is top side) and it is a 15K Bit louder (But I run it on low fan) but that's more cool and the SAME ELECTRICAL DRAW.
I do not recommend Advent Air (made in China) abut there is anothr conpany (one of the "C" companies I think Like Coleman) that also makes a replacement Upper Unit (or rather an upper unit with an adapt-a-kit) for Carrir.