What regular maintenance activity extends the lifespan of a gas furnace?

Regular servicing and cleaning of internal components is vital for extending the lifespan of a gas furnace. Over time, dust, dirt, and debris can accumulate within the furnace, impacting its efficiency and potentially leading to failures or malfunctions. Regular maintenance, which includes cleaning parts such as the blower, burners, and heat exchanger, ensures that the furnace operates at optimal efficiency. This not only helps in maintaining proper airflow and combustion but also reduces wear and tear on vital components, ultimately prolonging the operational life of the furnace.

While adjusting the thermostat can improve comfort levels in your home, it does not directly affect the wear and tear on the furnace itself. Repainting the exterior may enhance aesthetic appeal, but it has no impact on the functionality or efficiency of the internal mechanisms. Changing the filter is important for maintaining air quality and furnace efficiency, but without the comprehensive servicing and cleaning that includes inspection and maintenance of internal parts, the furnace may still be prone to issues that can shorten its lifespan.