I am a highly skilled and experienced home service professional who has been in the industry for over 10 years. I recently completed a job that involved fall heating maintenance on three American Standard gas furnaces. The job required me to inspect the furnaces, clean the burners, inspect the heat exchanger, and replace the air filter. I also checked the electrical connections and tested the thermostat to ensure it was working properly. After the maintenance was completed, the furnaces were running efficiently and the homeowners were happy with the results.