Neutralizer stone Water panel Heating maintenance on x2 Carrier Gas Furnace systems. Perform a tune-up and cleaning to help ensure reliable and safe operation. Inspect for cracks & deterioration of Heat Exchanger Check and clean Burners, brush and vacuumed-ok Check and clean Air Filter- replaced. x2) 14x24x1 & 16x24x1 provided by customer Check and clean ignition Assembly-ok Check and clean- flame sensor-ok Check and tested hot surface igniter Check Safety Controls-ok Check limit switch and rollout switches Check CO2-CO- okay Check electrical wiring and components-ok Check Gas valve & Gas Line-ok Check Combustion Air, intake & exhaust lines-ok Check Temperatures settings Performance-ok Check and clean condensate water traps-ok Check and replace neutralizer stones Check and clean condensate pump- washed out. Check and cleaned Humidifier-cabinet and cartridge Hum water panel- replaced Check and run Thermostats- operating at this time. Inspected water heater Check for water leak- no le