Customer would like to speak to a comfort advisor regarding duct work. Duct system is undersized as original unit was a 2.5 ton and a 4 ton has been out in its place. Customer is available Monday evening from 5-7 pm. Ducane gas furnace with straight cool condenser was installed last year. Coil has been freezing up since installed. Poor airflow across the coil is causing it to freeze. Customer wants to speak to a comfort advisor regarding redesigning duct work to improve air flow.