A furnace is a system used to generate heat in households or any interior places and it uses air, steam or hot water to create and spread the heat. This is an efficient way to keep warm during winter or whenever it is cold outside. This system can still get break downs and might need to be repaired. The furnace can be repaired by a technician or you can do it yourself. Even though this sounds easy sometimes it can be quite costly and it can need repair at the most inconvenient time and end up being quite costly. Therefore it is quite important to arrange for seasonal maintenance to make sure your furnace is running efficiently and safely. It is also a good idea to locate a carbon monoxide detector badge at the furnace to monitor its safety. The tools that are used or that you can use to fix the furnace are a screwdriver, a new air filter, vacuum and light oil for motor bearings. The first step is to turn off the power and in this case, the fuel. There should be a switch on the side of the furnace, if not, check the electrical service panel and shut off the appropriate breaker. The gas line will be connected to the furnace in a black pipe and will have a shut off valve nearby. To shut off the gas, turn the valve so it is perpendicular to the gas line. The next step is to vacuum the furnace interior. To do this open the furnace door. With a vacuum cleaner having a long snorkel attachment, vacuum out the base of the furnace and the gas burners. Get all the crevices cleaned of any loose dust or debris. The following step is to change the air filter. The furnace filter is the one component that needs to be checked and possibly changed monthly during the heating season. Replace it as part of this seasonal maintenance. Check the Fan belt on your furnace that drives the blower. Inspect the belt for glazing, cracking or fraying. If any of those signs are evident, replace the belt. Also check the belt tension. By pushing down in the center of the belt, it should feel taut and only deflect about 1/2″ – 3/4″. If it deflects more than that, tighten the belt by loosening the attachment bracket. Then, move the motor assembly so the belt tightens and hold the motor assembly in place while maintaining tension on the belt. Tighten the attachment bracket. Lubricate Oil Bearings if your furnace is older or if it has a motor without permanently sealed bearings, the bearings will need to be oiled. Find the oiling caps. They may also be on the bearing shaft. Drop a few drops of lightweight household oil in the oil spout below the caps. Don’t over oil. Replace Furnace Cover and Reconnect. Once completed, replace the furnace cover and turn the electrical power back on along with the gas. Relight the pilot if necessary.