Verified zone three master bedroom damper motor is bad. Unfortunately this is an April air and it’s not a serviceable part and would need to be completely replaced. The replacement would be a Honeywell that is serviceable if it has a future issue. I found the unit ducted incorrectly, compromising the systems, efficiency and capacity. I left a proposal for the ductwork, replacing the supply and return Plenum and tapping them from the proper locations to achieve unit efficiency and longevity.
