Conducting maintenance tasks on a furnace in Princeton, NJ for a valued client. Performed a close visual inspection for signs of damage like rust or wear. I ran the furnace, listening for unusual sounds that may indicate issues. Everything sounds fine. Cleaned around the furnace and the venting, ensuring a dust-free and efficient unit. Changed all air filters, a crucial step for optimal performance. I checked fan belts and oil filter, lubricated components, cleaned nozzle and hoses, and tested system efficiency. Heating system is running in best condition, ready for more cold temperatures!