Hubby and I own a HVAC company, but Chattanooga is a little far for us to make a service call :/
Hubby says the inside coil needs to be cleaned, its in a closet or the attic, you need to open the unit and clean them. A slant coil is easy to see / an A frame will have a panel you have to remove to clean. A HVAC parts house like CC Dickson should sell you a bottle of Green coil cleaner. Put some in a pump up sprayer and clean it up. If this still has the lines freezing up, call a service company to check freon levels, and MAKE them leak detect or add a stop leak sealant to the line set... Some service companies make lots of money ripping homeowners off not fixing leaks
The tonnage is is hidden in the model number, its 2 1/2 tons . This unit would work for about half your house. The unit is terribly undersized for 3,500 sq ft. This would not cool your whole home even working at top performance
I will answer anyones AC questions...
Hey, thank you, but I don’t have such a coil set-up. I can pull off the side panel and will look the plenum coil.
We’ll see how it does now with the clean filter etc. over the weekend we’re targeting 102 or more!!
G