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I had a tech look at my furnace and he said the heat rollout? switch was turning the furnace off because the combustion chamber is cracked and the flame from the burner is coming out the front of the furnace. Meanwhile, a previous tech said he does not believe that it is a cracked combustion chamber and that he believes that the furnace is shutting off because of emissions from a hot water tank that has a short and improperly installed chimney on it. The furnace is a flamemaster.
