Bonnewagon said:I think that is a self-adjusting orifice tube.I can't really comment on that as I live in NYC and it doesn't get as hot as by you. You probably should research that or start a new topic. There are quite a few guys here from Arizona too.
Researched and according to what "Google" says not a big difference. HOWEVER while searching I found an A/C shop in PHX that has them for $10 bucks. For the extra 7 dollars what the hell its worth a try!