Blue shield club heater maintenance. Joe(JC)R 01/08/2025 Performed full system evaluation and safety inspection. I arrived to perform the customer’s annual heater maintenance. The customer said that the thermostat had low battery. I showed them how to remove the thermostat from the wall. I then checked the furnace. The heat exchanger was in good shape and the heater components were running well. I also replaced the filters for the customer. The system is operating correctly at this time.