Preventive maintenance and professional inspections are important aspects of the operation of your gas furnace.  While evaluating your gas furnace, we may uncover small cracks, leaks, rust, rot, soot, frayed wires or corroded electrical contacts that can lead to furnace failure. While there are a variety of reasons and potential fixes that can increase your energy efficiency, our professional HVAC technician may reveal that the AFUE (Annual Fuel Utilization Efficiency) of your gas furnace may be the primary cause of these excessive costs.