The answer to 'when to service heat exchanger' is that you should have your HVAC technician inspect and service the heat exchanger annually, typically during the fall before the heating season starts. The heat exchanger is a critical component of your furnace that transfers heat from the combustion process to the air that circulates through your home. Regular inspection and maintenance is essential to ensure safe and efficient operation.
During the annual service, your HVAC technician will visually inspect the heat exchanger for cracks, corrosion, or other signs of wear. They will also test for proper airflow, check the burners, and ensure the heat exchanger is operating within manufacturer specifications. If any issues are found, the technician can clean, adjust, or replace components as needed to restore proper function.