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Revised diagnosis, a/c freezing up

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Revised diagnosis, a/c freezing up Fins 06-04-2007
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Posted by Bill on June 4, 2007, 10:11 pm
> >Finding a "competent" tech is the problem around here. I would gladly
> >pay one to repair the system. No one I know can recomend one, so I'm
> >trying to diagnose it myself and fix the problem.
>
> Sorry dude. I call "BULLSHIT"!
> If you don't have a tech in your area that can diagnose something that
> simple then you are either living in a mentally deficient colony or
> somewhere in Africa with the pigmies.
> You are just a tight ass and want to fix it cheap.
> Call stormy. He'll break it for free.
> Bubba

I vote for the squeak walker!

--
http://hotair.com

Posted by Tony on June 5, 2007, 11:00 am
Well Mr.Fins
I am not AC person However I just can stand by
and read all the crap! why don't you fix your air
handler "fan" see that is running when comprssor
is on and also make sure your filter is clean
I bet 9-1 problem will be fix.
if your air handler does not operate properly
there is no load on cooling coil and eventually will
freeze up and the suction to you compressor like wise.
Tony


>I just talked to the tenant in the house. He showed me where the
> outside ac unit was freezing. It's at the valve on the end of the
> insulated tubing going to the outside compressor unit.
> When it freezes, about every few days, the compressor is still
> running, but the air handler is not running.
> FWI: The syste3m is 9 years old, and ia a Goodman, Janitrol CKT 30-
> A3208
> Any help is appreciated.
>



Posted by Michael Shell on June 6, 2007, 12:55 am
On Mon, 04 Jun 2007 06:45:59 -0700

> When it freezes, about every few days, the compressor is still
> running, but the air handler is not running.
> FWI: The syste3m is 9 years old, and ia a Goodman, Janitrol
> CKT 30-A3208
> Any help is appreciated.


Fins,

I am assuming that you know for sure that the inside blower is
not running - as opposed to just no air flowing through the ducts.
If you have a situation where the fan is running, but no air is
blowing, the evaporator has froze up and is blocking the air
flow. Check/clean/replace the filters to ensure proper airflow.

Now, assuming that the inside fan is indeed not running at all,
but the outside unit still is - a highly abnormal condition - here
is my bet:

The outside unit contactor has gone bad and its contacts
are sticking every so often. When this happens, the power
will remain on at the outside unit causing it to continue
to operate. Without airflow inside, the evaporator will
then quickly ice up. Thus, it is a problem with the outside
unit not shutting off as opposed to the inside unit shutting
off prematurely.

The contactor is a just a relay that switched the power to the
outside unit. You will have to get the correct one for your unit,
but here is a popular example:

http://www.drillspot.com/products/152964/SQUARE-D_8910DP31V14_Compact-Definite-Purpose-Contactor

My advice is to get the largest one that will fit your unit.
For example, if they have a 25amp model (such as the Square D
8910DP21V14) and there is a 30amp model with the same mount
and connectors (e.g., 8910DP31V14) go with the latter. 40amp and
above contactors will often not use screw terminals (so you can't
attach loop connectors to them).

The contactor will be the thing the 220V input power cable
connects to.


Do let us all know how it turns out,

Mike Shell

Posted by Noon-Air on June 6, 2007, 7:01 am

> On Mon, 04 Jun 2007 06:45:59 -0700
>
>> When it freezes, about every few days, the compressor is still
>> running, but the air handler is not running.
>> FWI: The syste3m is 9 years old, and ia a Goodman, Janitrol
>> CKT 30-A3208
>> Any help is appreciated.
>
>
> Fins,
>
> I am assuming that you know for sure that the inside blower is
> not running - as opposed to just no air flowing through the ducts.
> If you have a situation where the fan is running, but no air is
> blowing, the evaporator has froze up and is blocking the air
> flow. Check/clean/replace the filters to ensure proper airflow.

Its entirely possible that all it needs is to be cleaned/serviced, and the
only reason its freezing up is because the idiot is running it with the
cover off of the air handler.

> Now, assuming that the inside fan is indeed not running at all,
> but the outside unit still is - a highly abnormal condition - here
> is my bet:
>
> The outside unit contactor has gone bad and its contacts
> are sticking every so often. When this happens, the power
> will remain on at the outside unit causing it to continue
> to operate. Without airflow inside, the evaporator will
> then quickly ice up. Thus, it is a problem with the outside
> unit not shutting off as opposed to the inside unit shutting
> off prematurely.
>
> The contactor is a just a relay that switched the power to the
> outside unit. You will have to get the correct one for your unit,
> but here is a popular example:
>
>
http://www.drillspot.com/products/152964/SQUARE-D_8910DP31V14_Compact-Definite-Purpose-Contactor
>
> My advice is to get the largest one that will fit your unit.
> For example, if they have a 25amp model (such as the Square D
> 8910DP21V14) and there is a 30amp model with the same mount
> and connectors (e.g., 8910DP31V14) go with the latter. 40amp and
> above contactors will often not use screw terminals (so you can't
> attach loop connectors to them).
>
> The contactor will be the thing the 220V input power cable
> connects to.
>
>
> Do let us all know how it turns out,
>
> Mike Shell



Posted by Fins on June 6, 2007, 12:36 pm
> On Mon, 04 Jun 2007 06:45:59 -0700
>
> > When it freezes, about every few days, the compressor is still
> > running, but the air handler is not running.
> > FWI: The syste3m is 9 years old, and ia a Goodman, Janitrol
> > CKT 30-A3208
> > Any help is appreciated.
>
> Fins,
>
> I am assuming that you know for sure that the inside blower is
> not running - as opposed to just no air flowing through the ducts.
> If you have a situation where the fan is running, but no air is
> blowing, the evaporator has froze up and is blocking the air
> flow. Check/clean/replace the filters to ensure proper airflow.
>
> Now, assuming that the inside fan is indeed not running at all,
> but the outside unit still is - a highly abnormal condition - here
> is my bet:
>
> The outside unit contactor has gone bad and its contacts
> are sticking every so often. When this happens, the power
> will remain on at the outside unit causing it to continue
> to operate. Without airflow inside, the evaporator will
> then quickly ice up. Thus, it is a problem with the outside
> unit not shutting off as opposed to the inside unit shutting
> off prematurely.
>
> The contactor is a just a relay that switched the power to the
> outside unit. You will have to get the correct one for your unit,
> but here is a popular example:
>
> http://www.drillspot.com/products/152964/SQUARE-D_8910DP31V14_Compact...
>
> My advice is to get the largest one that will fit your unit.
> For example, if they have a 25amp model (such as the Square D
> 8910DP21V14) and there is a 30amp model with the same mount
> and connectors (e.g., 8910DP31V14) go with the latter. 40amp and
> above contactors will often not use screw terminals (so you can't
> attach loop connectors to them).
>
> The contactor will be the thing the 220V input power cable
> connects to.
>
> Do let us all know how it turns out,
>
> Mike Shell

Thanks Mike. It has been running OK for a few days now. I am going to
get a contactor and have it ready.

I haven't been there when it stopped working. The coil has been
cleaned, and no, the system was not run with the air handler cover
off.

Thanks to all


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