Upon arrival found equipment working properly but zoning not working properly. Found that the damper for zone 1 was not opening all the way due to the spring being worn out and causing the damper to only open to 80-90%. With both damper motors being the same age recommended replacing both damper motors. Also found that on the 12in bypass for zoning there is no bypass damper. With no bypass damper the system is recirculating hot and cold air back through the system and not to the zone. In heating season air temps get to high and cause the unit to shut off and Vice versa in the cooling. Homeowner wants to move forward with replacing motors and adding bypass damper. Due to time supply shop is closed and will have to order in the morning