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The dispatcher called Bob first thing in the morning before he left his home and told him a customer with a gas furnace has a strange smell in the house. Bob arrived and the customer explained that, when the furnace is operating, he smells something peculiar and he’s concerned. It smells like his gas grill when it first starts up. Bob turned the furnace on and went to the furnace room to take a look. The unit appeared to be operating correctly. Btu Buddy then entered and asked, “Is the furnace drafting like it should?”