Coleman Mach 3 coils freezing

Thank you for the replies everyone. I found a new upper unit locally and I installed it in about an hour. It was very easy to swap them out. I had quotes of about $500 to install plus the unit cost. The soonest anyone could look at is was August and our whole summer would have been gone. No one would have wanted to go in the camper with the mid 90 temps and high humidity that we have been getting already. I still can't believe that a 2.5 year old unit went bad, but, it happens. I am now sitting here enjoying meat locker temperatures!