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Posted by on October 17, 2008, 11:27 pm
> Hi All... my neighbor's carbon monoxide alarm goes off, she shuts down
> her 1996 Carrier Weathermaker 58TUA hi-efficiency furnace, calls in
> Frank the HVAC guy, and after a peek inside (from the top), Frank
> concludes that the heat exchanger is cracked and a whole new furnace
> is needed.
> Is this possible? Common?
> How can you tell if it's cracked (it looks like new haha)?
> What else might be the matter?
> Carrier had a 20yr warranty on those things back then... shouldn't a
> suggestion be made to use it?
> This was an expensive furnace... wt*?
> Thanks for all of your help,
> :Dan
It's just the normal shit that Frank pulls on a daily basis.
Now tell your friend to call someone that's competent this time!
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Posted by Zyp on October 19, 2008, 7:19 pm
kjpro @ news .com wrote:
>> Hi All... my neighbor's carbon monoxide alarm goes off, she shuts
>> down her 1996 Carrier Weathermaker 58TUA hi-efficiency furnace,
>> calls in Frank the HVAC guy, and after a peek inside (from the top),
>> Frank concludes that the heat exchanger is cracked and a whole new
>> furnace is needed.
>> Is this possible? Common?
>> How can you tell if it's cracked (it looks like new haha)?
>> What else might be the matter?
>> Carrier had a 20yr warranty on those things back then... shouldn't a
>> suggestion be made to use it?
>> This was an expensive furnace... wt*?
>> Thanks for all of your help,
>>> Dan
> It's just the normal shit that Frank pulls on a daily basis.
> Now tell your friend to call someone that's competent this time!
You should [listen to kjpro]. Get a second opinion. Find a service company
with a "Gas Analyzer" to check for CO coming from the appliance. They can
also check for a crack by checking the CO level before, during, and after
the furnace is in operation in the flu. Your local utility may offer a free
inspection to confirm the HVAC service tech's opinion.
--
Zyp
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Posted by Bubba on October 19, 2008, 9:14 pm
>kjpro @ news .com wrote:
>>> Hi All... my neighbor's carbon monoxide alarm goes off, she shuts
>>> down her 1996 Carrier Weathermaker 58TUA hi-efficiency furnace,
>>> calls in Frank the HVAC guy, and after a peek inside (from the top),
>>> Frank concludes that the heat exchanger is cracked and a whole new
>>> furnace is needed.
>>> Is this possible? Common?
>>> How can you tell if it's cracked (it looks like new haha)?
>>> What else might be the matter?
>>> Carrier had a 20yr warranty on those things back then... shouldn't a
>>> suggestion be made to use it?
>>> This was an expensive furnace... wt*?
>>> Thanks for all of your help,
>>>> Dan
>> It's just the normal shit that Frank pulls on a daily basis.
>> Now tell your friend to call someone that's competent this time!
>You should [listen to kjpro]. Get a second opinion. Find a service company
>with a "Gas Analyzer" to check for CO coming from the appliance. They can
>also check for a crack by checking the CO level before, during, and after
>the furnace is in operation in the flu.
Zyp,
Just a slight correction. A CO detector will NOT always find a crack
in a heat exchanger. Many furnaces with cracks support proper
combustion just fine. I wouldnt want that furnace in my home but a
crack in a heat exchanger doesnt always burn "dirty" and cause carbon
monoxide.
Im just restating that but Im sure thats what you meant. :-)
Bubba
> Your local utility may offer a free
>inspection to confirm the HVAC service tech's opinion.
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Posted by Steve on October 19, 2008, 10:35 pm
>>kjpro @ news .com wrote:
>>>> Hi All... my neighbor's carbon monoxide alarm goes off, she shuts
>>>> down her 1996 Carrier Weathermaker 58TUA hi-efficiency furnace,
>>>> calls in Frank the HVAC guy, and after a peek inside (from the top),
>>>> Frank concludes that the heat exchanger is cracked and a whole new
>>>> furnace is needed.
>>>> Is this possible? Common?
>>>> How can you tell if it's cracked (it looks like new haha)?
>>>> What else might be the matter?
>>>> Carrier had a 20yr warranty on those things back then... shouldn't a
>>>> suggestion be made to use it?
>>>> This was an expensive furnace... wt*?
>>>> Thanks for all of your help,
>>>>> Dan
>>> It's just the normal shit that Frank pulls on a daily basis.
>>> Now tell your friend to call someone that's competent this time!
>>You should [listen to kjpro]. Get a second opinion. Find a service
>>company
>>with a "Gas Analyzer" to check for CO coming from the appliance. They can
>>also check for a crack by checking the CO level before, during, and after
>>the furnace is in operation in the flu.
> Zyp,
> Just a slight correction. A CO detector will NOT always find a crack
> in a heat exchanger. Many furnaces with cracks support proper
> combustion just fine. I wouldnt want that furnace in my home but a
> crack in a heat exchanger doesnt always burn "dirty" and cause carbon
> monoxide.
> Im just restating that but Im sure thats what you meant. :-)
> Bubba
You know the HX is cracked when the furnace cycles off and the pilot gets
blown out by the fan, or it trips the roll-out switch(s)
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Posted by Don Ocean on October 20, 2008, 12:48 am
Steve wrote:
>>> kjpro @ news .com wrote:
>>>>> Hi All... my neighbor's carbon monoxide alarm goes off, she shuts
>>>>> down her 1996 Carrier Weathermaker 58TUA hi-efficiency furnace,
>>>>> calls in Frank the HVAC guy, and after a peek inside (from the top),
>>>>> Frank concludes that the heat exchanger is cracked and a whole new
>>>>> furnace is needed.
>>>>> Is this possible? Common?
>>>>> How can you tell if it's cracked (it looks like new haha)?
>>>>> What else might be the matter?
>>>>> Carrier had a 20yr warranty on those things back then... shouldn't a
>>>>> suggestion be made to use it?
>>>>> This was an expensive furnace... wt*?
>>>>> Thanks for all of your help,
>>>>>> Dan
>>>> It's just the normal shit that Frank pulls on a daily basis.
>>>> Now tell your friend to call someone that's competent this time!
>>> You should [listen to kjpro]. Get a second opinion. Find a service
>>> company
>>> with a "Gas Analyzer" to check for CO coming from the appliance. They can
>>> also check for a crack by checking the CO level before, during, and after
>>> the furnace is in operation in the flu.
>> Zyp,
>> Just a slight correction. A CO detector will NOT always find a crack
>> in a heat exchanger. Many furnaces with cracks support proper
>> combustion just fine. I wouldnt want that furnace in my home but a
>> crack in a heat exchanger doesnt always burn "dirty" and cause carbon
>> monoxide.
>> Im just restating that but Im sure thats what you meant. :-)
>> Bubba
>
> You know the HX is cracked when the furnace cycles off and the pilot gets
> blown out by the fan, or it trips the roll-out switch(s)
Not necessarily so. The ventor fan sucks ad does not blow.. And the
crack is usually on the top side out of the airstream of the indoor
blower. An infrared camera can spot it when still hot. Or sometimes
smoking it right after shut down There are many furnaces that are
diagnosed with cracked exchangers when all that is wrong is a clogged
chamber in the seconfdary exchanger. This most oftern occurs on propane
furnaces and is due to improper firing. This can be crappy tuning or a
wide variance in the BTUH of the fuelgases. In the winter moisture is
either added or condensed into the gase to make it easier to shove up
the pipelines. This moisture is what causes a tarring effect in the
chambers when the mix is bad.
>
>
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> her 1996 Carrier Weathermaker 58TUA hi-efficiency furnace, calls in
> Frank the HVAC guy, and after a peek inside (from the top), Frank
> concludes that the heat exchanger is cracked and a whole new furnace
> is needed.
> Is this possible? Common?
> How can you tell if it's cracked (it looks like new haha)?
> What else might be the matter?
> Carrier had a 20yr warranty on those things back then... shouldn't a
> suggestion be made to use it?
> This was an expensive furnace... wt*?
> Thanks for all of your help,
> :Dan