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Blower Coil Freeze After Compressor Replacement?

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Blower Coil Freeze After Compressor Replacement? Jim Conway 06-18-2008
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Posted by Noon-Air on June 18, 2008, 7:38 pm

> wrote:
>
>>
>>> Hi,
>>> My in-laws had an exterior AC compressor replaced (by an HD sub-
>>> contractor FWIW...) which worked for a few days, and then ceased
>>> working when a coil leak froze up at the blower (as diagnosed by the
>>> same HD sub-contractor who they called back). He explained that the
>>> problem at the blower was pre-existing, and had nothing to do with
>>> his
>>> original compressor replacement. He's attempting to locate a
>>> replacement coil for the single defective coil, but estimated
>>> replacing all coils which could be necessary if he can't find a
>>> single
>>> coil and could cost upwards of $2K. After they just spent $3k having
>>> compressor replaced.
>>
>>So he didn't properly diagnose the system. Thats gotta suck to have to pay
>>for a noobs training
>
> On the one hand, a dead compressor makes other things hard to
> diganose.
>
> On the other hand, he certainly should have at least checked
> static pressures, and if the system was flat, threw a test charge in
> to find the leak ( and thus the bad coil ), etc, and discussed with
> the owner the TOTAL cost of repair, as compared to the cost of
> replacing the system ( with everything 100 % new and under warranty ).

Exactly!!!

> These days, a resi compressor change isn't going to make much
> sense in probably most cases, on a cost basis.

nope... not at all

>>> At the same time the new unit crapped out, they also developed a
>>> thermostat problem at a second unit they have in their attic. That
>>> problem has already been fixed by the same tech. Each unit is
>>> controlled by its own thermostat, but I'm not sure if both systems
>>> could somehow tie together....
>>>
>>>
>>> I find the timing of both problems suspect (though not unlikely), and
>>> am wondering if they are being sold a bill of goods. Feedback
>>> appreciated!
>>
>>yes
>>
>>Maybe its time to call somebody who knows WTF they are doing.
>
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Posted by Stormin Mormon on June 18, 2008, 8:36 pm
Whenever a compressor goes out, or any other part. It's nice to know WHY the
part went out. Was there something wrong, that caused the compressor to
strain, and finally quit?

So, he splices in a new compressor. That allows the chance to find out what
was the original problem. Time to get the tech out a couple more times, to
find out what else is wrong.

Typically with a frozen coil, you replace the entire evaporator coil. None
of this "replace one coil, and come back for the rest". Within a system, the
evaporator is an entire unit. So, that sounds a bit suspicious.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
.


Hi,
My in-laws had an exterior AC compressor replaced (by an HD sub-
contractor FWIW...) which worked for a few days, and then ceased
working when a coil leak froze up at the blower (as diagnosed by the
same HD sub-contractor who they called back). He explained that the
problem at the blower was pre-existing, and had nothing to do with
his
original compressor replacement. He's attempting to locate a
replacement coil for the single defective coil, but estimated
replacing all coils which could be necessary if he can't find a
single
coil and could cost upwards of $2K. After they just spent $3k having
compressor replaced.

At the same time the new unit crapped out, they also developed a
thermostat problem at a second unit they have in their attic. That
problem has already been fixed by the same tech. Each unit is
controlled by its own thermostat, but I'm not sure if both systems
could somehow tie together....


I find the timing of both problems suspect (though not unlikely), and
am wondering if they are being sold a bill of goods. Feedback
appreciated!




Posted by new jersey on June 18, 2008, 9:36 pm
need to replace the coil because it is freezing up WOW!
Sue the SOB
Tony
> Hi,
> My in-laws had an exterior AC compressor replaced (by an HD sub-
> contractor FWIW...) which worked for a few days, and then ceased
> working when a coil leak froze up at the blower (as diagnosed by the
> same HD sub-contractor who they called back). He explained that the
> problem at the blower was pre-existing, and had nothing to do with
> his
> original compressor replacement. He's attempting to locate a
> replacement coil for the single defective coil, but estimated
> replacing all coils which could be necessary if he can't find a
> single
> coil and could cost upwards of $2K. After they just spent $3k having
> compressor replaced.
>
> At the same time the new unit crapped out, they also developed a
> thermostat problem at a second unit they have in their attic. That
> problem has already been fixed by the same tech. Each unit is
> controlled by its own thermostat, but I'm not sure if both systems
> could somehow tie together....
>
>
> I find the timing of both problems suspect (though not unlikely), and
> am wondering if they are being sold a bill of goods. Feedback
> appreciated!
>
>



Posted by new jersey on June 18, 2008, 9:45 pm
Why any mechanic/tech. would replace evaporator coil because it is freezing
up
can some one explain that to me please please please?
tony

> Hi,
> My in-laws had an exterior AC compressor replaced (by an HD sub-
> contractor FWIW...) which worked for a few days, and then ceased
> working when a coil leak froze up at the blower (as diagnosed by the
> same HD sub-contractor who they called back). He explained that the
> problem at the blower was pre-existing, and had nothing to do with
> his
> original compressor replacement. He's attempting to locate a
> replacement coil for the single defective coil, but estimated
> replacing all coils which could be necessary if he can't find a
> single
> coil and could cost upwards of $2K. After they just spent $3k having
> compressor replaced.
>
> At the same time the new unit crapped out, they also developed a
> thermostat problem at a second unit they have in their attic. That
> problem has already been fixed by the same tech. Each unit is
> controlled by its own thermostat, but I'm not sure if both systems
> could somehow tie together....
>
>
> I find the timing of both problems suspect (though not unlikely), and
> am wondering if they are being sold a bill of goods. Feedback
> appreciated!
>
>



Posted by Noon-Air on June 18, 2008, 10:03 pm

> Why any mechanic/tech. would replace evaporator coil because it is
> freezing up
> can some one explain that to me please please please?
> tony

It depends on *WHY* it was freezing... like maybe it was full of leaks and
low on refrigerant.


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