I arrived for a recall on a system we recently inspected. I spoke with the homeowner and found the system to be freezing up due to it beings low on refrigerant charge. I inspect the evaporator coil with a electronic leak detector and found the evaporator coil to be leaking refrigerant. The homeowner also had another 2.5 ton system not cooling correctly. I inspected this system a d found it to be completely frozen over. I also found the this system to be low on refrigerant and leaking refrigerant as well. I gave the homeowner options on rep both evaporator coils with a furnace removal and reinstalled. We also decided to bid the garage for a new complete system installation for their new home business.