wrote in message
I had the builder look at it and they suggested that I keep the vent
closed a notch in the room above the garage. That did not help. He
checked all the vents and he said everything is fine as per the blue
print. I am not getting a satifactory answer. What could be wrong
and what are the possible solutions to fix the issue.


Try two notches, or three notches. Be sure the return vent in the warmer
room is not blocked.