Plaintiffs evidence, taken as true, establishes these facts: During the first week in January 1959 the furnace began to operate unsatisfactorily. Some rooms were hot and some cold. In consequence of plaintiffs complaint to defendant, a representative of Garmon Furnace Company came out on two occasions, inspected the registers, and disappeared under the house for an interval. On January 12, 1959, the date of the second visit, the representatives attention was called to sooty deposits on the rugs and the furniture. Thereafter sometime between January 13th and January 16th, the furnace "backfired" and blew "greasy soot that comes out of an oil furnace" onto "the walls, windows, woodwork, floors, carpets, draperies, furniture and everything" throughout the house. On Friday, January 16th, the Lumbermens Mutual Insurance Company sent Mr. Manly McWilliams, a professional cleaner, to repair the damage. He observed that the heat ducts were "pretty well clogged up with soot" although Mrs. Jewell told him that "the furnace people had been out and the furnace had been repaired." Lumbermens Mutual instructed Mr. McWilliams not to proceed until the condition which had caused the damage had been repaired and he had gotten in touch with Mr. Garmon. Neither did anything further because the house was destroyed on Sunday, January 18th, by a fire originating "around the furnace area."