Mikepier wrote:
On Sep 10, 1:46 pm, Aaron Fude wrote:
Hi,

My central air unit is on the 3rd floor. When it's on, the air flow
on the 3rd is tremendous and it becomes cold in a second. At the same
time, the air is barely coming out on the 2nd and the 1st floors. The
ducts are old, but I inspected the parts that are accessible and they
seem to be intact. What could be the problem here and what should I
try next?

Many thanks in advance,

Aaron

Check for closed dampers. If they are open, check for broken ducts, or
perhaps close the ducts partially on the 3rd floor to redirect some of
the air to the floors below.

I second that!

--
Moe Jones
http://www.MoeJones.info