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Last year I had a new AC system installed. The old unit was a 3 ton and the installer recommeded a 4 ton. Well, from day one the system would freeze up from time to time. I could not figure out any consistancy at the time. Well, this is the first spring I have had it and have determined that the unit freezes in the evening when the outside temp goes down.
I called someone else out for a second opinion and he basically told me that I was sold a unit that is too big for the set-up in my home. He said my R/A deck is too small (See pic below) and my fur down duct system was designed for 1200CFM. He recommended I have the other guy come out and test with a tru-flow template to determine CFM range.
The options he presented were:
1. Downsize the condenser to a 3.5 ton. I dont feel this is an option due to the fact that the one I have is less than a year old.
or
2. Raise the R/A deck and create a plenum in the attic and supply air with new ducting. The current R/A deck is 10" tall, 36" deep and 60" wide with two 24" X 8" intakes on each side of the closet.
I'm wondering what cost effective options I may have here. I'm going to call the other guy back but I have a feeling he will not take care of it.
Any help will be appreciated.
I called someone else out for a second opinion and he basically told me that I was sold a unit that is too big for the set-up in my home. He said my R/A deck is too small (See pic below) and my fur down duct system was designed for 1200CFM. He recommended I have the other guy come out and test with a tru-flow template to determine CFM range.
The options he presented were:
1. Downsize the condenser to a 3.5 ton. I dont feel this is an option due to the fact that the one I have is less than a year old.
or
2. Raise the R/A deck and create a plenum in the attic and supply air with new ducting. The current R/A deck is 10" tall, 36" deep and 60" wide with two 24" X 8" intakes on each side of the closet.
I'm wondering what cost effective options I may have here. I'm going to call the other guy back but I have a feeling he will not take care of it.

Any help will be appreciated.