Results 1 to 5 of 5
  1. #1
    Join Date
    Oct 2009

    The dinosaur is gone

    Today I change a Lennox g8137 furnace> the damm thing had the original gas valve and other controls. Only the blower motor was changed.
    Serial number was 66-12. Now this is well befor my time, havent even seen a g8 for 12 years and am not sure if the 66 is the year.

    I also changed the Honneywell T90 stat with the lennox name on it.

    Here is the catch. no visible cracks in the heat exchaner in the normal locations. If it was a g12 it would have been done.

    Home owner opted for a 80% but its still going to save some decent money

  2. #2
    Join Date
    Dec 2002
    SouthEast NC ICW & Piedmont Foothills
    real steel in the HX..............not that crappy stamped stuff
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  3. #3
    Join Date
    Sep 2005
    Bay Area, CA
    I still service gravity or retrofitted gravity furnaces that are 2-3 times older then me, built in the early 40's cant crack a steel heat exchanger it seems. Cost an arm and a leg to run too.
    Global Warming or: None like it hot
    No pleasure, no rapture, no exquisite sin greater... than central air. -Dogma

  4. #4
    Join Date
    Sep 2002
    I don't know
    I always thought the G12 was steel.

    G8s were manufactured in canada until the early 90s. (design probably revised a few times - larger blowers for a/c and electronic ignition)
    General public's attitude towards our energy predicament: "I reject the reality of finite resource depletion and substitute it with my own; energy is infinite, we just need an alternative storage medium to run the cars on. The economy can grow indefinitely - we just need to "green" everything! Technology is energy! Peak what?"

  5. #5
    Join Date
    Oct 2009
    standing pilot, belt drive on this baby.

    lennox would be so proud

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