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Hello my name is ***** ***** will be my pleasure to assist you. It sounds as if the furnace is oversized for the application. Is it running two stages of heat is there a wire connected to the w2 terminal in the furnace? There may be a solution without replacing the problem. rutting in another return grill in the return duct near the furnace may help. Make sure all the dampers to the heat runs are open to the house.