Checked all operations in the cooling mode and inspected both furnace filters. Both filters were dirty and replaced. Checked the static pressure of both units and found that they both have high static pressure. Checked all electrical and refrigerant components. Today I found that the older R-22 system was low on refrigerant. Due to the age and condition of the system customer will look into replacement of the system. The slightly newer ac is operating properly at this time. A supervisor will be out tomorrow to evaluate the ductwork and price out a new ac system.