Upon inspection, the furnace was found to be operational, but there was an issue with the pressure switch tube. The tube, which is a crucial component for the furnace's proper functioning, had accumulated debris. This debris was obstructing the airflow and preventing the pressure switch from closing properly. I carefully cleaned the pressure switch tube, removing all the debris to ensure unobstructed airflow. After cleaning, I tested the furnace to confirm that the pressure switch was functioning correctly and that the furnace was running efficiently. The system is now operating smoothly, and the homeowner can expect reliable heating performance.
