Furnace manufacturers all recommend annual inspections and maintenance by a qualified technician. The furnace tune-up service consists of

• Run test the furnace
• Inspect interior of the furnace for rust or mold
• Inspect exterior of the furnace
• Test all furnace safety mechanisms
• Test blower motor amperage
• Clean burners
• Inspect flue and exhaust port for obstructions
• Safety check condenser fan blades.
• Complete supply and return plenum Inspection
• Remove and clean existing air filters
• Measure temperature difference in supply/return
• Inspect humidification system if applicable
• Search combustion air vents for leaks and obstructions