Replace Heat Exchanger or Furnace

Discussion in 'HVAC' started by tokaiy@yahoo.com, Dec 28, 2005.

  1. Guest

    I can either replace a heat exchanger for about $400 (part under
    warranty, labor based upon actual time), or buy a new furnace installed
    for a net price of $2,600.

    Old furnace: 90% Carrier with a clogged secondary heat exchanger (still
    works for about 15 minutes at a time until the limit switch trips, so
    can maintain temp in current 30 degree weather). 88,000 BTU.
    Manufacturing date of 1989, but some evidence suggests it was installed
    in 1992. I replaced the motherboard a few years ago (did it myself for
    about $125). The igniter was replaced a few weeks ago (free because the
    service guy broke it during the tune & clean). Other than that, I think
    all the parts are original. I think it has a lifetime heat exchanger
    warranty (part only). Clogged secondary was diagnosed by: 1) Tripping
    of Limit cutoff switch; and 2) Soot in exhaust pipe.

    New furnace: 94-96% Carrier Infinity 96. 80,000 BTU. Net cost of $2,600
    which is: $3,550 less $150 Carrier rebate, $170 for paying cash (rather
    than credit), $150 utility company rebate, $400 for replacing a
    Carrier (bad heat exchanger program?), and $80 for tune and clean
    performed 10 days ago. 10-year parts and labor warranty. Lifetime heat
    exchanger warranty (part only). Because it is replacing a 90% Carrier,
    it is a pretty direct swap-out. The new unit is a little shorter, so a
    short collar to bridge the gap. PVC air supply and exhaust pipes are
    fine.

    Situation: South East Wisconsin. I'm guessing the new furance will save
    $200/yr, but also make the house more comfortable because of the
    multi-stage, and hopefully a little more quiet.

    Because of rebates, a single stage 90% Carrier is only $300 cheaper,
    and the other 2 stage Carrier is about $150 cheaper. The comparable
    Lennox is about $500 more expensive (primarily due to the $400 Carrier
    rebate). I have not priced a Trane or Rheem.

    I currently have 2 furnaces, and the other Carrier is identical, except
    for being a smaller BTU. If I replace the furnace, I would keep the old
    one for spare parts.

    When the service man diagnosed the problem, he quoted me a repair cost
    that included the cost of the part ($800 repair). Only when I was doing
    some purchase research did I discover the furnace had a lifetime heat
    exchanger warranty.

    Questions:
    1) Any thoughts on replacing the heat exchanger, or the whole furnace
    (seems like the age of the furnace is on the edge of being "old")?
    2) Does the price seem reasonable?
    3) How can I determine if they will install it right?
    4) Did they cause the problem when they tuned the furnace (dislodged
    rust that clogged the secondary)? Service man did say the heat
    exchanger was rusting, but should last a few more years.
    5) If they didn't cause the problem, should they have been able to see
    the problem during the tune and clean (the problem arose when I set
    back the thermostat 5 degrees when we were away for the weekend, and
    the furnace needed extended run time to warm up the house)?
    6) Should I consider a comparable Trane or Rheem?

    Thanks in advance for your thoughts.
    , Dec 28, 2005
    #1
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  2. Bubba Guest

    On 28 Dec 2005 06:30:57 -0800, "" <>
    wrote:

    >I can either replace a heat exchanger for about $400 (part under
    >warranty, labor based upon actual time), or buy a new furnace installed
    >for a net price of $2,600.


    (much to do about nothing, deleted here)
    >
    >Thanks in advance for your thoughts.


    Your best course of action would be to go lick a window then....
    bash your head in with a rock.

    (both lines admittedly stolen)
    Bubba
    Bubba, Dec 28, 2005
    #2
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  3. Steve Scott Guest

    At a minimum the existing furnace is 13 years old. Life expectancy of
    a modern furnace is around 15 years. Replace it.

    On 28 Dec 2005 06:30:57 -0800, "" <>
    wrote:

    >I can either replace a heat exchanger for about $400 (part under
    >warranty, labor based upon actual time), or buy a new furnace installed
    >for a net price of $2,600.
    >
    >Old furnace: 90% Carrier with a clogged secondary heat exchanger (still
    >works for about 15 minutes at a time until the limit switch trips, so
    >can maintain temp in current 30 degree weather). 88,000 BTU.
    >Manufacturing date of 1989, but some evidence suggests it was installed
    >in 1992.



    --
    'I think the Wheel of Morality needs a
    tune-up.' -- Wakko Warner
    Steve Scott, Dec 28, 2005
    #3
  4. Bubba Guest

    But then when some nut is going to replace a 90% eff heat exchanger
    under warranty for only $400..................
    I hope the company loses their ass on that one.
    Bubba

    On Wed, 28 Dec 2005 15:06:16 GMT, Steve Scott <>
    wrote:

    >At a minimum the existing furnace is 13 years old. Life expectancy of
    >a modern furnace is around 15 years. Replace it.
    >
    >On 28 Dec 2005 06:30:57 -0800, "" <>
    >wrote:
    >
    >>I can either replace a heat exchanger for about $400 (part under
    >>warranty, labor based upon actual time), or buy a new furnace installed
    >>for a net price of $2,600.
    >>
    >>Old furnace: 90% Carrier with a clogged secondary heat exchanger (still
    >>works for about 15 minutes at a time until the limit switch trips, so
    >>can maintain temp in current 30 degree weather). 88,000 BTU.
    >>Manufacturing date of 1989, but some evidence suggests it was installed
    >>in 1992.
    Bubba, Dec 28, 2005
    #4
  5. Noon-Air Guest

    <> wrote in message
    news:...
    >I can either replace a heat exchanger for about $400 (part under
    > warranty, labor based upon actual time), or buy a new furnace installed
    > for a net price of $2,600.
    >
    > Old furnace: 90% Carrier with a clogged secondary heat exchanger (still
    > works for about 15 minutes at a time until the limit switch trips, so
    > can maintain temp in current 30 degree weather). 88,000 BTU.
    > Manufacturing date of 1989, but some evidence suggests it was installed
    > in 1992. I replaced the motherboard a few years ago (did it myself for
    > about $125). The igniter was replaced a few weeks ago (free because the
    > service guy broke it during the tune & clean). Other than that, I think
    > all the parts are original. I think it has a lifetime heat exchanger
    > warranty (part only). Clogged secondary was diagnosed by: 1) Tripping
    > of Limit cutoff switch; and 2) Soot in exhaust pipe.
    >
    > New furnace: 94-96% Carrier Infinity 96. 80,000 BTU. Net cost of $2,600
    > which is: $3,550 less $150 Carrier rebate, $170 for paying cash (rather
    > than credit), $150 utility company rebate, $400 for replacing a
    > Carrier (bad heat exchanger program?), and $80 for tune and clean
    > performed 10 days ago. 10-year parts and labor warranty. Lifetime heat
    > exchanger warranty (part only). Because it is replacing a 90% Carrier,
    > it is a pretty direct swap-out. The new unit is a little shorter, so a
    > short collar to bridge the gap. PVC air supply and exhaust pipes are
    > fine.
    >
    > Situation: South East Wisconsin. I'm guessing the new furance will save
    > $200/yr, but also make the house more comfortable because of the
    > multi-stage, and hopefully a little more quiet.
    >
    > Because of rebates, a single stage 90% Carrier is only $300 cheaper,
    > and the other 2 stage Carrier is about $150 cheaper. The comparable
    > Lennox is about $500 more expensive (primarily due to the $400 Carrier
    > rebate). I have not priced a Trane or Rheem.
    >
    > I currently have 2 furnaces, and the other Carrier is identical, except
    > for being a smaller BTU. If I replace the furnace, I would keep the old
    > one for spare parts.
    >
    > When the service man diagnosed the problem, he quoted me a repair cost
    > that included the cost of the part ($800 repair). Only when I was doing
    > some purchase research did I discover the furnace had a lifetime heat
    > exchanger warranty.
    >
    > Questions:
    > 1) Any thoughts on replacing the heat exchanger, or the whole furnace
    > (seems like the age of the furnace is on the edge of being "old")?
    > 2) Does the price seem reasonable?
    > 3) How can I determine if they will install it right?
    > 4) Did they cause the problem when they tuned the furnace (dislodged
    > rust that clogged the secondary)? Service man did say the heat
    > exchanger was rusting, but should last a few more years.
    > 5) If they didn't cause the problem, should they have been able to see
    > the problem during the tune and clean (the problem arose when I set
    > back the thermostat 5 degrees when we were away for the weekend, and
    > the furnace needed extended run time to warm up the house)?
    > 6) Should I consider a comparable Trane or Rheem?
    >
    > Thanks in advance for your thoughts.


    If you want the best, go with the Trane or Rheem...but if you just want
    cheap, get a goodman, if you want something that will keep your tech a roof
    over his head and food on the table for many years to come, get a Lennox or
    Carrier.
    Noon-Air, Dec 28, 2005
    #5
  6. CBHVAC Guest

    "Noon-Air" <> wrote in message
    news:...
    >
    > <> wrote in message
    > news:...
    >>I can either replace a heat exchanger for about $400 (part under
    >> warranty, labor based upon actual time), or buy a new furnace installed
    >> for a net price of $2,600.
    >>
    >> Old furnace: 90% Carrier with a clogged secondary heat exchanger (still
    >> works for about 15 minutes at a time until the limit switch trips, so
    >> can maintain temp in current 30 degree weather). 88,000 BTU.
    >> Manufacturing date of 1989, but some evidence suggests it was installed
    >> in 1992. I replaced the motherboard a few years ago (did it myself for
    >> about $125). The igniter was replaced a few weeks ago (free because the
    >> service guy broke it during the tune & clean). Other than that, I think
    >> all the parts are original. I think it has a lifetime heat exchanger
    >> warranty (part only). Clogged secondary was diagnosed by: 1) Tripping
    >> of Limit cutoff switch; and 2) Soot in exhaust pipe.
    >>
    >> New furnace: 94-96% Carrier Infinity 96. 80,000 BTU. Net cost of $2,600
    >> which is: $3,550 less $150 Carrier rebate, $170 for paying cash (rather
    >> than credit), $150 utility company rebate, $400 for replacing a
    >> Carrier (bad heat exchanger program?), and $80 for tune and clean
    >> performed 10 days ago. 10-year parts and labor warranty. Lifetime heat
    >> exchanger warranty (part only). Because it is replacing a 90% Carrier,
    >> it is a pretty direct swap-out. The new unit is a little shorter, so a
    >> short collar to bridge the gap. PVC air supply and exhaust pipes are
    >> fine.
    >>
    >> Situation: South East Wisconsin. I'm guessing the new furance will save
    >> $200/yr, but also make the house more comfortable because of the
    >> multi-stage, and hopefully a little more quiet.
    >>
    >> Because of rebates, a single stage 90% Carrier is only $300 cheaper,
    >> and the other 2 stage Carrier is about $150 cheaper. The comparable
    >> Lennox is about $500 more expensive (primarily due to the $400 Carrier
    >> rebate). I have not priced a Trane or Rheem.
    >>
    >> I currently have 2 furnaces, and the other Carrier is identical, except
    >> for being a smaller BTU. If I replace the furnace, I would keep the old
    >> one for spare parts.
    >>
    >> When the service man diagnosed the problem, he quoted me a repair cost
    >> that included the cost of the part ($800 repair). Only when I was doing
    >> some purchase research did I discover the furnace had a lifetime heat
    >> exchanger warranty.
    >>
    >> Questions:
    >> 1) Any thoughts on replacing the heat exchanger, or the whole furnace
    >> (seems like the age of the furnace is on the edge of being "old")?
    >> 2) Does the price seem reasonable?
    >> 3) How can I determine if they will install it right?
    >> 4) Did they cause the problem when they tuned the furnace (dislodged
    >> rust that clogged the secondary)? Service man did say the heat
    >> exchanger was rusting, but should last a few more years.
    >> 5) If they didn't cause the problem, should they have been able to see
    >> the problem during the tune and clean (the problem arose when I set
    >> back the thermostat 5 degrees when we were away for the weekend, and
    >> the furnace needed extended run time to warm up the house)?
    >> 6) Should I consider a comparable Trane or Rheem?
    >>
    >> Thanks in advance for your thoughts.

    >
    > If you want the best, go with the Trane or Rheem...but if you just want
    > cheap, get a goodman, if you want something that will keep your tech a
    > roof over his head and food on the table for many years to come, get a
    > Lennox or Carrier.
    >



    Best at what? :)
    Rheems stack nice in teh salvage yard....


    >
    >
    CBHVAC, Dec 28, 2005
    #6
  7. Abby Normal Guest

    Good advice, there Noon. change the POS.
    Noon-Air wrote:
    > <> wrote in message
    > news:...
    > >I can either replace a heat exchanger for about $400 (part under
    > > warranty, labor based upon actual time), or buy a new furnace installed
    > > for a net price of $2,600.
    > >
    > > Old furnace: 90% Carrier with a clogged secondary heat exchanger (still
    > > works for about 15 minutes at a time until the limit switch trips, so
    > > can maintain temp in current 30 degree weather). 88,000 BTU.
    > > Manufacturing date of 1989, but some evidence suggests it was installed
    > > in 1992. I replaced the motherboard a few years ago (did it myself for
    > > about $125). The igniter was replaced a few weeks ago (free because the
    > > service guy broke it during the tune & clean). Other than that, I think
    > > all the parts are original. I think it has a lifetime heat exchanger
    > > warranty (part only). Clogged secondary was diagnosed by: 1) Tripping
    > > of Limit cutoff switch; and 2) Soot in exhaust pipe.
    > >
    > > New furnace: 94-96% Carrier Infinity 96. 80,000 BTU. Net cost of $2,600
    > > which is: $3,550 less $150 Carrier rebate, $170 for paying cash (rather
    > > than credit), $150 utility company rebate, $400 for replacing a
    > > Carrier (bad heat exchanger program?), and $80 for tune and clean
    > > performed 10 days ago. 10-year parts and labor warranty. Lifetime heat
    > > exchanger warranty (part only). Because it is replacing a 90% Carrier,
    > > it is a pretty direct swap-out. The new unit is a little shorter, so a
    > > short collar to bridge the gap. PVC air supply and exhaust pipes are
    > > fine.
    > >
    > > Situation: South East Wisconsin. I'm guessing the new furance will save
    > > $200/yr, but also make the house more comfortable because of the
    > > multi-stage, and hopefully a little more quiet.
    > >
    > > Because of rebates, a single stage 90% Carrier is only $300 cheaper,
    > > and the other 2 stage Carrier is about $150 cheaper. The comparable
    > > Lennox is about $500 more expensive (primarily due to the $400 Carrier
    > > rebate). I have not priced a Trane or Rheem.
    > >
    > > I currently have 2 furnaces, and the other Carrier is identical, except
    > > for being a smaller BTU. If I replace the furnace, I would keep the old
    > > one for spare parts.
    > >
    > > When the service man diagnosed the problem, he quoted me a repair cost
    > > that included the cost of the part ($800 repair). Only when I was doing
    > > some purchase research did I discover the furnace had a lifetime heat
    > > exchanger warranty.
    > >
    > > Questions:
    > > 1) Any thoughts on replacing the heat exchanger, or the whole furnace
    > > (seems like the age of the furnace is on the edge of being "old")?
    > > 2) Does the price seem reasonable?
    > > 3) How can I determine if they will install it right?
    > > 4) Did they cause the problem when they tuned the furnace (dislodged
    > > rust that clogged the secondary)? Service man did say the heat
    > > exchanger was rusting, but should last a few more years.
    > > 5) If they didn't cause the problem, should they have been able to see
    > > the problem during the tune and clean (the problem arose when I set
    > > back the thermostat 5 degrees when we were away for the weekend, and
    > > the furnace needed extended run time to warm up the house)?
    > > 6) Should I consider a comparable Trane or Rheem?
    > >
    > > Thanks in advance for your thoughts.

    >
    > If you want the best, go with the Trane or Rheem...but if you just want
    > cheap, get a goodman, if you want something that will keep your tech a roof
    > over his head and food on the table for many years to come, get a Lennox or
    > Carrier.
    Abby Normal, Dec 28, 2005
    #7
  8. Abby Normal Guest

    Best condensing furnace on the market for about 12 years now.
    Abby Normal, Dec 28, 2005
    #8
  9. Bubba Guest

    On Wed, 28 Dec 2005 09:23:00 -0600, "Noon-Air" <>
    wrote:

    >
    ><> wrote in message
    >news:...
    >>I can either replace a heat exchanger for about $400 (part under
    >> warranty, labor based upon actual time), or buy a new furnace installed
    >> for a net price of $2,600.
    >>
    >> Old furnace: 90% Carrier with a clogged secondary heat exchanger (still
    >> works for about 15 minutes at a time until the limit switch trips, so
    >> can maintain temp in current 30 degree weather). 88,000 BTU.
    >> Manufacturing date of 1989, but some evidence suggests it was installed
    >> in 1992. I replaced the motherboard a few years ago (did it myself for
    >> about $125). The igniter was replaced a few weeks ago (free because the
    >> service guy broke it during the tune & clean). Other than that, I think
    >> all the parts are original. I think it has a lifetime heat exchanger
    >> warranty (part only). Clogged secondary was diagnosed by: 1) Tripping
    >> of Limit cutoff switch; and 2) Soot in exhaust pipe.
    >>
    >> New furnace: 94-96% Carrier Infinity 96. 80,000 BTU. Net cost of $2,600
    >> which is: $3,550 less $150 Carrier rebate, $170 for paying cash (rather
    >> than credit), $150 utility company rebate, $400 for replacing a
    >> Carrier (bad heat exchanger program?), and $80 for tune and clean
    >> performed 10 days ago. 10-year parts and labor warranty. Lifetime heat
    >> exchanger warranty (part only). Because it is replacing a 90% Carrier,
    >> it is a pretty direct swap-out. The new unit is a little shorter, so a
    >> short collar to bridge the gap. PVC air supply and exhaust pipes are
    >> fine.
    >>
    >> Situation: South East Wisconsin. I'm guessing the new furance will save
    >> $200/yr, but also make the house more comfortable because of the
    >> multi-stage, and hopefully a little more quiet.
    >>
    >> Because of rebates, a single stage 90% Carrier is only $300 cheaper,
    >> and the other 2 stage Carrier is about $150 cheaper. The comparable
    >> Lennox is about $500 more expensive (primarily due to the $400 Carrier
    >> rebate). I have not priced a Trane or Rheem.
    >>
    >> I currently have 2 furnaces, and the other Carrier is identical, except
    >> for being a smaller BTU. If I replace the furnace, I would keep the old
    >> one for spare parts.
    >>
    >> When the service man diagnosed the problem, he quoted me a repair cost
    >> that included the cost of the part ($800 repair). Only when I was doing
    >> some purchase research did I discover the furnace had a lifetime heat
    >> exchanger warranty.
    >>
    >> Questions:
    >> 1) Any thoughts on replacing the heat exchanger, or the whole furnace
    >> (seems like the age of the furnace is on the edge of being "old")?
    >> 2) Does the price seem reasonable?
    >> 3) How can I determine if they will install it right?
    >> 4) Did they cause the problem when they tuned the furnace (dislodged
    >> rust that clogged the secondary)? Service man did say the heat
    >> exchanger was rusting, but should last a few more years.
    >> 5) If they didn't cause the problem, should they have been able to see
    >> the problem during the tune and clean (the problem arose when I set
    >> back the thermostat 5 degrees when we were away for the weekend, and
    >> the furnace needed extended run time to warm up the house)?
    >> 6) Should I consider a comparable Trane or Rheem?
    >>
    >> Thanks in advance for your thoughts.

    >
    >If you want the best, go with the Trane or Rheem...but if you just want
    >cheap, get a goodman,


    > if you want something that will keep your tech a roof
    >over his head and food on the table for many years to come, get a Lennox or
    >Carrier.


    Shhhhhhh. Dont give away all the secrets. :)
    Bubba
    Bubba, Dec 28, 2005
    #9
  10. CBHVAC Guest

    "Abby Normal" <> wrote in message
    news:...
    > Best condensing furnace on the market for about 12 years now.
    >


    Best at replacement Id say..
    CBHVAC, Dec 29, 2005
    #10
  11. Abby Normal Guest

    lol, must be a member of the carrier cult.

    Still selling clamshells?

    CBHVAC wrote:
    > "Abby Normal" <> wrote in message
    > news:...
    > > Best condensing furnace on the market for about 12 years now.
    > >

    >
    > Best at replacement Id say..
    Abby Normal, Dec 29, 2005
    #11
  12. CBHVAC Guest

    "Abby Normal" <> wrote in message
    news:...
    > lol, must be a member of the carrier cult.
    >
    > Still selling clamshells?


    Nope..dont sell the big blue oval...


    >
    > CBHVAC wrote:
    >> "Abby Normal" <> wrote in message
    >> news:...
    >> > Best condensing furnace on the market for about 12 years now.
    >> >

    >>
    >> Best at replacement Id say..

    >
    CBHVAC, Jan 1, 2006
    #12
  13. ~^Johnny^~ Guest

    On Wed, 28 Dec 2005 10:37:00 -0500, "CBHVAC" <>
    wrote:

    >Rheems stack nice in teh salvage yard....



    That was Ruud!


    --
    -john
    wide-open at throttle dot info
    ~^Johnny^~, Jan 7, 2006
    #13
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