Furnace precision tune up. Pulled and cleaned burners. Inspected heat exchanger for any visual defects, did not find any at this time. Tested ignition assembly components, including flame safety, for proper tolerance ranges. Cleaned out condensate trap. Checked all remaining electrical inside of the unit, measured motor amp draws for correct operating range. Inspected blower wheel for dirt and debris. Checked airflow for proper air movement. Measured combustion and gas pressure for safe levels. Ensured temperatures were within manufacture desired performance. System is heating and operating with no issues at this time. The main flame safety sensor was replaced under a parts and labor warranty due to the old flame sensor testing out of range, the new flame sensor is testing within manufacturer limits. Steam humidifier precision tune up. Removed the old canister and replaced it with a new one. Replaced rubber O-ring in the drain assembly. Inspected and cleaned the drain valve/ port. I