The following tasks should be part of maintaining a furnace on a regular basis: 1. Change or clean the air filter regularly, usually every 1-3 months, depending on how much the furnace is used and the type of filter in it. 2. Inspect and clean the blower assembly, which includes the blower housing, blower wheel, and motor, to make sure air is blowing through the furnace and into the ducts and that there's nothing obstructing it, in case it's you and your family. 3. Check the thermostat. A furnace isn't going to work for you if it's not working for your thermostat. 4. Clean the burners. You want fire, not a bunch of unburned gas or a gas fire. 5. Inspect the heat exchanger.
6. Forbid possible future failures by checking and tightening all electrical connections within the furnace. 7. If the furnace has any moving parts, pay attention to them; if the motor needs lubrication, do it; otherwise, the motor may not have the life span it should. 8. The furnace startup cycle should be about three times as long as the first-run cycle. The furnace should not run any longer than it has to. 9. If parts of the furnace vent system are not visible, that means they're either blocked or really tired and need replacing.
If you cannot see the vent system, it's either obstructed or worn out and dangerous. 10. The safe and reliable function of the ignition system is crucial to furnace operation.
The efficiency and lifespan of the furnace, along with the safety of its operation, can be ensured by following these maintenance steps.