Heating Maintenance on x4 Gas Furnace systems. x3 Carrier Furnace x1 Trane Furnace 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) 14x28x1 (x1) 12x24x1 & (x1) Aprilaire #310 High efficiency filter Check and clean ignition Assembly-ok Check and clean- flame sensor/flame rod-ok Check and tested hot surface igniter and rollout switches Check Safety Controls-ok 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 split / temp rise Performance-ok Check and clean condensate trap-ok Check zoning operation- ok Check and run Thermostats- operating at this time. Inspected water heater Check for water leak- no leakage at this time. Check gas valve and gas Line-ok Ran water heater, operating well at this moment. Ran and tested s