Tuning up your furnace includes the following steps:
• Cleaning of the blower compartment.
• Checking and adjusting the wiring.
• Adjusting the burner.
• Examination of the heat exchanger, gas pressure, and flame operation.
• Cleaning or replacement of indoor air filters.
• Inspection of the igniter or pilot light to ensure it is functioning correctly.
• Connecting the ducts and checking the airflow.
• Checking the efficiency and safety of the system in addition.