You can prevent most furnace burning smell problems before the first cold snap. Change your filter, book a yearly furnace tune-up, keep boxes, laundry and paint cans away from the furnace, and run the heat for an hour on a mild fall day to burn off summer dust before you really need it. These simple habits also help your furnace run safely all winter. Purcell Heating & Air shares practical, Calgary-tested tips in this easy guide, plus when a smell means you need a repair instead.