An A/C freeze up in AZ would be unusual ( I spend my winters in the area ), however for your situation , I'd say leave the temp on the unit that doesn't freeze up set for about 75 degrees and set the unit that you've had the issue with on fan only .
With the ducted A/C system, windows covered all day, and no opening of the entry door the one unit should keep up.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
|