I am a skilled professional that works for a AC & Heat Solutions company. I recently completed a fall heating maintenance job. The job involved tuning up an American standard gas furnace. I started by checking the furnace's electrical connections and wiring to ensure they were secure and in good condition. I then cleaned the furnace's burners, inspected the heat exchanger, and tested the thermostat to ensure they were working properly. I also checked the air filter and replaced it if necessary. Finally, I performed a safety check to ensure the furnace was operating safely and efficiently. Overall, the job was successful, and the customer was happy with the results.