Hi all:
I recently bought a 3 storey house + basement house. I have a gas furnace in the basement for heating. On the third floor of the house there are 4 air ducts which have hot air blowing with a good flow from them. There is a room below this one on the second floor where there is a air duct but no air is coming from it at all. Howeve in the other rooms on the second floor the air s coing with a good flow from all the vents. Similarly there is a kitchen on the first floor and there is one vent directly below the room on the second floor where there is an air duct but there is no air coming from the air vent. However there are other vents on the first floor where the air is coming in properly from the air vents.
I noticed that on the second floor, in one of the ducts (which works) there is a string attached to something down in the duct.
My questions are: (1) What could be the reson that there is no air coming from the one vent on the second floor and also from the vent directly beneath it on the first floor? Is it possible that the previous owners from whom I bought the house installed the ducts but never connected the ducts to some main air pipe?
(2) What is that string in the duct used for?
(3) Who do I call to fix this? A general contractor or a furnace guy or ???
Thanks, Goadude