I am a skilled professional that works for a Alaskan Air Conditioning & Heating - Tucson company. I recently completed a winter maintenance job on a 13-year-old Rheem furnace. The job involved cleaning the furnace, replacing the air filter, and checking the thermostat. I also checked the furnace's burners, heat exchanger, and blower motor for any signs of damage or wear. I also checked the furnace's electrical connections and wiring to ensure they were in good working condition. Finally, I tested the furnace to ensure it was operating correctly and efficiently.