Hello. I'm not an ac repair tech. Maybe a question to ask the dealer is to see if the ac unit is too large for the area to be cooled? Thinking it may work like a home ac unit,where there is too large an ac unit for the home so the system doesn't perform properly? My brother had his fridge die on him in the mountains, he thinks it might have been caused by the elevation changes. Just an idea for you to ask the dealer.
Paul n Pam
TV: 2011 F250 SC SB 4x4 6.2
TT: 2011 Coachmen Chaparral 28RBS