Fall heater tune up one system gas furnace. Upon arrival the system was turned on in heat mode and tested. The blower motor, heat exchanger, burners, flame sensor, hot surface igniter, vent system, gas lines, ductwork, filter, attic insulation, and electrical connections were all inspected. During the inspection the attic insulation was noticed to be a little thin at around five to six inches in most places. The compressor blanket in the outdoor unit was also noticed to be deteriorating and it is recommended that both of these issues be fixed and an estimate will be sent. The unit itself is heating properly at this time.