Performed a heat maintenance service as part of a membership plan on a Rheem gas furnace in Aubrey, TX. I inspected and cleaned the burners to ensure proper combustion, tested the flame sensor for reliable ignition, and checked the heat exchanger for cracks or signs of corrosion. The blower motor was inspected for wear, and I lubricated all moving parts where applicable. I also tested the thermostat's communication with the furnace and verified proper cycling. The air filter was replaced to improve airflow, and the gas pressure was adjusted to manufacturer specifications for optimal performance. Lastly, I measured carbon monoxide levels to confirm safe operation. The system is now operating efficiently and safely.