No AC call, current unit is not reaching temperature. Pipes frozen up, water moisture around base of unit as pipes thawed. Owner thought was leaking but just condensation from pipe. Too low on refrigerant caused AC to overwork and freeze up. Unit is 15 years old, informed customer about r22 and it's costs. Created Estimate for new unit, as it is more cost effective to get a newer unit that runs off 410a refrigerant.