Thank you everyone!!
So many great ideas and suggestions. Two biggest things that helped 1) figured out AC Z2 and removed auto-program. Running all three on cool hi. 2) turned off exhaust fans which were sucking cool air out - odd, thought heat rises, but guess with AC in ceiling it isn't same.
Other items I did - check filters/ roof units, considered shades/awning, fans, and read instructions!
I am going to post a separate general forum question on best outside window covers but open to any suggestions private message or otherwise!
Thanks again everyone. IVR2 rocks - glad to be a supporter! What a cool site. Thanks to all involved - going to try to make the Oct. (cooler then!) rally....
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