[donade]

We've been up in the attic to check the duct work and when we inspect the ducts to the bedrooms, the air is flowing fine; as soon as we reconnect to the main duct and seal it, no air flows to the bedroom vents. What are we missing???

 

[beenthere]

What did you use t blow air through them when you were in the attic?

 

[bob22]

Perhaps a damper is closed after the joint?