A furnace plays a critical role in maintaining home comfort during cold weather, yet it is often neglected until problems arise. Routine preventive maintenance not only reduces unexpected breakdowns but also helps the system operate efficiently and last longer. Homeowners who understand the importance of care can avoid costly repairs and improve energy savings. Furnace maintenance checklist homeowners should know Furnace maintenance checklist 1. Replace Air Filters Regularly Clogged filters restrict airflow, forcing the furnace to work harder than necessary. Replacing filters every one to three months keeps the system efficient and ensures cleaner indoor air. A fresh filter also reduces strain on the blower motor, extending the unit’s life. 2. Inspect the Thermostat A malfunctioning thermostat leads to uneven heating or unnecessary energy use. Check that settings are accurate and test responsiveness by adjusting temperatures slightly. Upgrading to a programmable or smart thermostat fur...