Service Call Platinum Client-13 yr old trane system. Customer states the suction line was frozen at the condenser yesterday. Refrigerant levels tested good. Filter and evaporator are clean, blower running. Returns are not blocked off and supply vents are open. Contactor has some scorch marks on it and felt hot upon inspection. Replaced contactor. Possible that it did not release when call for cooling had stopped which would have kept ac unit running and freezing up.