A clean furnace filter traps dirt and allergens and makes your furnace run more efficiently — and last longer. This video shows you how to remove the furnace door panel, find the filter, and replace it with a new one. Replace furnace filters every month for best results.

Changing the furnace filter protects your furnace and filters the air, improving the air quality in your home. Disposable furnace filters have either a mesh pattern or a pleated accordion pattern. Replace these filters once a month to keep your furnace running optimally. If your system handles both heating and cooling, replace the filter monthly all year long.

Regularly inspect blower-fan belts for any sign of damage and replace the belt if it’s damaged. Knowing how to inspect the blower-fan belt improves furnace efficiency. Furnaces need monthly maintenance and many do-it-yourselfers overlook the blower-fan belt. A worn, wimpy belt isn’t dangerous, but it makes a squealing noise that may drive you crazy and, more important, cost you money.

It pays to have a professional, licensed heating contractor check your steam system every year. But you can perform three important maintenance tasks on your steam heating system yourself. Caring properly for your system will you save money in the long run through greater efficiency, but you'll also have peace of mind knowing that your system is operating safely.