Found something has gotten into duct system and tore it up from unit to mains. Also got into the return duct as well. Only way to fix is to replace duct system under mobile home. 3 ton package unit Would like to add the duct to the financing she has I don't have that on my tablet. Please call and set up to get done. Customer does have cooling, just a good portion is under the house. Estimate is for 940 dollars