Originally Posted By: bullwinkle
I bet your "new" expansion valve is acting up, sometimes not opening enough & icing up the coil. The low pressure switch (or sensor) is a fail-safe for the expansion valve, but I bet it eventually goes the other way & won't get cold enough.
That is my thought, and possibly there is existing contamination in the system that is gradually clogging the valve as time goes by.
Ram_Man have the dealer check the system for contamination or debris!
Can somebody please forward my post here to Ram_Man? I think he has me accidentally blocked or something.