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Posted by on October 21, 2008, 11:27 pm
> kjpro @ news .com wrote:
>>>>>> 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 exactly true...
>>>> Tripped rollouts on a unit with no vent pressure switch.
>>>> Problem? (it had a perfect heat exchanger)
>>> It's a 12 yr old Carrier...
>>> They had more than their fair share of lousy heat exchangers...
>>> I'd look into that 20yr warranty, although being prorated...
>>> geothermaljones
>> Nope, Lennox and the heat exchanger is fine...
> Using a CO gas analyzer can measure the CO from the flu. Generally
> something less than 18 ppm for most gas fired furnaces. When the indoor
> blower comes on and forces positive pressure into the heat exchanger [a
> rupture] will in most cases show the CO going down. [An increase in
> unburned gases [air] getting into the firebox will show a decrease in CO
> because of dilution.] When you see this condition, it warrants pulling to
> blower and / or burners for further investigation.
> The Carrier of a 1996 vintage will have an aluminized heat exchanger,
> albeit it's installed correctly would have a good life span, but if
> there's insufficient air... well you know. :)
> --
> Zyp
Ok, here's a clue for everyone...
What problem can exist from a unit with no pressure switch (and no other
fault sensed), yet it trips the rollout?
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Posted by Don Ocean on October 22, 2008, 1:40 am
kjpro @ news .com wrote:
>> kjpro @ news .com wrote:
>>>>>>> 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 exactly true...
>>>>> Tripped rollouts on a unit with no vent pressure switch.
>>>>> Problem? (it had a perfect heat exchanger)
>>>> It's a 12 yr old Carrier...
>>>> They had more than their fair share of lousy heat exchangers...
>>>> I'd look into that 20yr warranty, although being prorated...
>>>> geothermaljones
>>> Nope, Lennox and the heat exchanger is fine...
>> Using a CO gas analyzer can measure the CO from the flu. Generally
>> something less than 18 ppm for most gas fired furnaces. When the indoor
>> blower comes on and forces positive pressure into the heat exchanger [a
>> rupture] will in most cases show the CO going down. [An increase in
>> unburned gases [air] getting into the firebox will show a decrease in CO
>> because of dilution.] When you see this condition, it warrants pulling to
>> blower and / or burners for further investigation.
>> The Carrier of a 1996 vintage will have an aluminized heat exchanger,
>> albeit it's installed correctly would have a good life span, but if
>> there's insufficient air... well you know. :)
>> --
>> Zyp
>
> Ok, here's a clue for everyone...
> What problem can exist from a unit with no pressure switch (and no other
> fault sensed), yet it trips the rollout?
Vent plugged? And/or other things.. Lights with a bang?
>
>
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Posted by on October 22, 2008, 11:17 am
> kjpro @ news .com wrote:
>>> kjpro @ news .com wrote:
>>>>>>>> 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 exactly true...
>>>>>> Tripped rollouts on a unit with no vent pressure switch.
>>>>>> Problem? (it had a perfect heat exchanger)
>>>>> It's a 12 yr old Carrier...
>>>>> They had more than their fair share of lousy heat exchangers...
>>>>> I'd look into that 20yr warranty, although being prorated...
>>>>> geothermaljones
>>>> Nope, Lennox and the heat exchanger is fine...
>>> Using a CO gas analyzer can measure the CO from the flu. Generally
>>> something less than 18 ppm for most gas fired furnaces. When the indoor
>>> blower comes on and forces positive pressure into the heat exchanger [a
>>> rupture] will in most cases show the CO going down. [An increase in
>>> unburned gases [air] getting into the firebox will show a decrease in CO
>>> because of dilution.] When you see this condition, it warrants pulling
>>> to blower and / or burners for further investigation.
>>> The Carrier of a 1996 vintage will have an aluminized heat exchanger,
>>> albeit it's installed correctly would have a good life span, but if
>>> there's insufficient air... well you know. :)
>>> --
>>> Zyp
>> Ok, here's a clue for everyone...
>> What problem can exist from a unit with no pressure switch (and no other
>> fault sensed), yet it trips the rollout?
> Vent plugged? And/or other things.. Lights with a bang?
Very good grasshopper....
Mud nest in the outlet of the combustion blower.
Lit with a bang... enough to bow the cabinet door.
|
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Posted by Don Ocean on October 22, 2008, 9:23 pm
kjpro @ news .com wrote:
>> kjpro @ news .com wrote:
>>>> kjpro @ news .com wrote:
>>>>>>>>> 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 exactly true...
>>>>>>> Tripped rollouts on a unit with no vent pressure switch.
>>>>>>> Problem? (it had a perfect heat exchanger)
>>>>>> It's a 12 yr old Carrier...
>>>>>> They had more than their fair share of lousy heat exchangers...
>>>>>> I'd look into that 20yr warranty, although being prorated...
>>>>>> geothermaljones
>>>>> Nope, Lennox and the heat exchanger is fine...
>>>> Using a CO gas analyzer can measure the CO from the flu. Generally
>>>> something less than 18 ppm for most gas fired furnaces. When the indoor
>>>> blower comes on and forces positive pressure into the heat exchanger [a
>>>> rupture] will in most cases show the CO going down. [An increase in
>>>> unburned gases [air] getting into the firebox will show a decrease in CO
>>>> because of dilution.] When you see this condition, it warrants pulling
>>>> to blower and / or burners for further investigation.
>>>> The Carrier of a 1996 vintage will have an aluminized heat exchanger,
>>>> albeit it's installed correctly would have a good life span, but if
>>>> there's insufficient air... well you know. :)
>>>> --
>>>> Zyp
>>> Ok, here's a clue for everyone...
>>> What problem can exist from a unit with no pressure switch (and no other
>>> fault sensed), yet it trips the rollout?
>> Vent plugged? And/or other things.. Lights with a bang?
>
> Very good grasshopper....
> Mud nest in the outlet of the combustion blower.
> Lit with a bang... enough to bow the cabinet door.
Which of course cuts labor costs as it is already partially
disassembled. ;-p
>
>
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|
Posted by on October 22, 2008, 11:53 pm
> kjpro @ news .com wrote:
>>> kjpro @ news .com wrote:
>>>>> kjpro @ news .com wrote:
>>>>>>>>>> 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 exactly true...
>>>>>>>> Tripped rollouts on a unit with no vent pressure switch.
>>>>>>>> Problem? (it had a perfect heat exchanger)
>>>>>>> It's a 12 yr old Carrier...
>>>>>>> They had more than their fair share of lousy heat exchangers...
>>>>>>> I'd look into that 20yr warranty, although being prorated...
>>>>>>> geothermaljones
>>>>>> Nope, Lennox and the heat exchanger is fine...
>>>>> Using a CO gas analyzer can measure the CO from the flu. Generally
>>>>> something less than 18 ppm for most gas fired furnaces. When the
>>>>> indoor blower comes on and forces positive pressure into the heat
>>>>> exchanger [a rupture] will in most cases show the CO going down. [An
>>>>> increase in unburned gases [air] getting into the firebox will show a
>>>>> decrease in CO because of dilution.] When you see this condition, it
>>>>> warrants pulling to blower and / or burners for further investigation.
>>>>> The Carrier of a 1996 vintage will have an aluminized heat exchanger,
>>>>> albeit it's installed correctly would have a good life span, but if
>>>>> there's insufficient air... well you know. :)
>>>>> --
>>>>> Zyp
>>>> Ok, here's a clue for everyone...
>>>> What problem can exist from a unit with no pressure switch (and no
>>>> other fault sensed), yet it trips the rollout?
>>> Vent plugged? And/or other things.. Lights with a bang?
>> Very good grasshopper....
>> Mud nest in the outlet of the combustion blower.
>> Lit with a bang... enough to bow the cabinet door.
> Which of course cuts labor costs as it is already partially disassembled.
> ;-p
Don't forget the charge for sheet metal work. :-)
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