Arrived at the customer’s home to find the cause of uneven airflow. The customer was experiencing a high volume of heat to the upstairs zone and hardly any airflow on the downstairs zone. Found that the Honeywell damper for the upstairs was set to a “3”, meaning it is always 50% open when it is in the “closed” setting. This has been adjusted down to a 0, meaning it is completely closed when the upstairs thermostat is not calling for heating/cooling. Manually opened the main floor damper and ensured it opens and closes with voltages properly. Under warranty, ran a new thermostat wire between the furnace and the zone board. Customer approved to perform quoted repairs on the system. Picked up the material from Apex Supply Marietta. Disconnected the 14” duct from the main floor zone damper. Removed the older zone damper. Installed a replacement Honeywell zone damper and ensured it was secured to the collar with screws. Reconnected the ductwork and tested operation. While testing operation