A furnace should be maintained and serviced at least once a year, preferably before cold weather hits. This ensures that the furnace is working during the colder parts of the year and also helps prolong the life of the system.
Regular furnace maintenance also helps households save energy, which lowers the costs associated with running the furnace. Regular maintenance can reveal potentially dangerous situations before they become a health risk, such as identifying a carbon monoxide leak. Furnace maintenance usually includes other services, such as lubricating moving parts, inspecting the electrical components to prevent failure and cleaning, which prolongs the life of the furnace and ensures proper operation.