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Default Central A/C blows air on the 3rd floor, but barely on 2nd and 1st.

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
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Default Central A/C blows air on the 3rd floor, but barely on 2nd and1st.

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.
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Default Central A/C blows air on the 3rd floor, but barely on 2nd and1st.

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


My furnace/AC is in the basement - where it belongs! :-)

Anyway, every season I rebalance the ducts so that more cool air goes
to 2nd floor during the cooling season and more hot air goes to the
first floor during heating season. Cold air sinks, hot air rises.

Partially close some of the upper vents to force more air downstairs,
but keep in mind that whatever cool air comes out of the upper vents
will also add to the cooling of the lower floors as it sinks.

The ideal case would be electric dampers tied to a central controller
which takes input from three thermostats and continuously balances the
system as the air rises and falls.
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Default Central A/C blows air on the 3rd floor, but barely on 2nd and 1st.

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


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Default Central A/C blows air on the 3rd floor, but barely on 2nd and1st.

On Sep 10, 4:05*pm, "Moe Jones" wrote:
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 Joneshttp://www.MoeJones.info- Hide quoted text -

- Show quoted text -


On a somewhat unrelated note, I heard that if one is not careful and
closes twoo many vents, it can burn out the A/C unit. Is that true?


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Default Central A/C blows air on the 3rd floor, but barely on 2nd and 1st.

No, but it can be hard on the blower motor.


s


"Aaron Fude" wrote in message
...


On a somewhat unrelated note, I heard that if one is not careful and
closes twoo many vents, it can burn out the A/C unit. Is that true?


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Default Central A/C blows air on the 3rd floor, but barely on 2nd and 1st.

Steve Barker DLT wrote:
No, but it can be hard on the blower motor.


s


"Aaron Fude" wrote in message
...


On a somewhat unrelated note, I heard that if one is not careful and
closes twoo many vents, it can burn out the A/C unit. Is that true?


Hard on the compressor as well. With less airflow passing through the
equipment, the evaporator will become flooded with liquid, hence the
compressor may blow out.

--
Zyp


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