Overview of G26
The Lennox G26 (discontinued) is a high-efficiency gas furnace offering 92% AFUE. This model was offered in in 4 different models with downflow and horizontal options.
The G26 was equipped with Lennox's SureLight ignition system, which featured easy on board diagnostics with LED lights and was made of durable, silicon-nitride for long-lasting home heating.
Fully insulated cabinets and heating capacities of 50,000 to 125,000 BTUH are additional components of this unit.
Date created: 2017-01-06
CO Event and cracked heat exchanger
Thank heaven we added a co detector in our home and I encourage everyone
to do the same! Had a co event that required a fire department response
to evacuate the home and ventilate to remove dangerous co levels. Gas
company said they never saw such high readings from a furnace. Furnace
maintained annually by gas company and they were surprised at high
levels of co output and internal cracks that leaked. When Lennox
contacted they assume no responsibility and claim that any warranty had
expired less than 60 days ago. This is a good news story where no one
was injured. Who knows what would have happened without a detector.
Resulted in a solemn promise by my family never to own a Lennox product
again. I would urge you not to buy as well.
Date created: 2016-11-11
G26 has proven to be reliable
Had the furnace installed in 2002. The furnace that came with the house
was a piece of junk can't remember the brand but it wasn't a high
efficiency. Only had one issue in 2014 and that was water getting into
the blower. I am on a maintenance plan which I think is a good idea for
any furnace. We have a 1200 sq. Ft house and the furnace does a good job
keeping it warm. I dislike that I can't operate the blower motor in the
summer to help circulate the colder air from the basement. (May be an
installation oversight I don't know). I would buy another Lennox.
Date created: 2016-10-05
I got my G26 Lennox furnace installed in 1999 (17 years ago) under the
"Pulse Program", for the tidy sum of $640.00, and have never had a
problem with it! Just replaced it due to its age, to insure trouble
free service throughout the winter. If this new "Merit Series 14ACX"
works as good as the last one, I will be very happy!
Date created: 2015-11-15
Do you like pain
Run like hell from this Lennox furnace. I've got a new born baby in the house
and this junk of a furnace is always down. Heat exchanger, pressure switch,
induction fan, water leaks and more, except heat. Run like hell from this
brand. Again, look at the other reviews and buy another brand unless you
like pain, thanks.
Date created: 2012-12-27
Save yourself the headache, avoid Lennox
We have 2 Lennox g26q3 furnaces at in our local Historical Society
Museum, plus three more Lennox furnaces in an other building. To put it
short - they are junk; poorly designed and built with cheap components.
The two g26q3 furnaces both fail 2-3 times a year, typically on a
holiday. (I've become really good at repairing them). The two newer
Lennox furnaces, (different models) at the other facility typically fail
once a year. The only one that rarely has an issue is the 25 year-old
"inefficient" furnace. The whole "high efficiency" design is a joke,
because you will spend more on parts and service than you will save on
your gas bill!
Date created: 2012-01-17
I have had to fix it every year since I had it. Turns out the dealer was
very unreputable and went out of business soon after installation. I
have done all repairs myself and every year I repair something new on
it. I would never buy another lennox product ever!
Date created: 2011-10-26
Not sure what exact one, but I am for sure it is a g26. 7 years ago my
parents had carbon monoxide all through their house due to a heat
exchanger cracking and now 7 years later it cracked again and was
leaking carbon monoxide again all through the house. So now they have to
sit in the cold with no heat until this part comes in, which they
haven't even ordered yet (been 2 days)! Not only do my parents live there
but so does my 88 year old grandma and 2 year old niece. Called Lennox
corporate and complained because the part is still under warranty but
what about the over $500 repair fee that it costs?! Their answer to
this was.... That's your problem not ours..
Date created: 2010-01-14
I live in Charlotte NC and I've had a Lennox g26 for 11 years without a
single hiccup. Perfectly quiet. It's mounted in a basement, so it's at a
pretty constant temperature and reasonable humidity. I could see where a
unit mounted in an attic could have service life issues here.
Date created: 2009-10-15
I had a lennox g26 installed in my home 12 years ago and I have been
very satisfied with it. I have never had a repair of any kind, I simply
replace the filters regularly. This 40,000 btu unit replaced a 120,000
btu unit and though it has longer cycle times, it has never failed to
keep us warm.
Date created: 2009-04-10
Furnace from Hell
When I built my house in 1997 I installed a Lennox Elite g26. It has
never worked for more than a few months at a time and has never made it
through an entire heating season. Two circuit boards, heat exchanger,
fan motor have all been replaced. Last year a wiring harness caught fire
due to a short in a plugged connection. For the first 10 years the
dealer replaced the parts and fixed it at no charge to me. Each time it
was fixed we thought that would be the end of our trouble, only to have
it go out again in a few months. Now they want to charge to fix it. It
broke this past January, cost me almost $200 to fix it. Now in April it
is leaking exhaust fumes into the house setting off carbon monoxide
detector, so we shut it off. I have had it and won't pay to fix this
lemon. We asked Lennox to give us a new furnace, no reply as of yet.
Date created: 2009-03-05
Purchased a complete System, Heat Pump/Air and a propane high efficiency
g26q3-75-5 furnace. I have a four zone system. Heat exchanger failed
this past winter. Serviceman switched power off to furnace in mid Jan.
Lennox dealer ordered replacement but wanted $510.00 for labor. Lennox
warranty states free replacement for the heat exchanger but will not
supply heat exchanger to home owner nor will the Lennox dealer who has
my heat exchanger supply it to another licensed installer. Lennox is
protecting the Lennox dealers. Never buy Lennox again. Wish I new of a
unit that would be a direct replacement and get rid of the Lennox junk.
St. Louis, MO
Date created: 2008-12-18
Installed a Lennox G26 14 years ago and have been very pleased with this unit. VERY energy efficient, I think even more than it is rated.
Have had two parts replaced. An ignition switch and a blower control motor. I have noticed, over the years, the combustion air induction motor has gotten louder, with a sort of "vibration" sound. I guess after 14 years it may be dirty and/ or wearing out. The cost for the Lennox replacement part is about $250. Not sure how much labor would be to replace it. I plan to do it my self, as it seems easy.
So all in all, I've been very pleased with the efficiency and have had just two problems over 14 years. I've had a service/maintenance agreement on the unit for most of the 14 years: heating checked once in the winter and a/c in summer.
Salt Lake City, UT
Date created: 2008-02-23
During the ten years since I had this furnace installed (a G-26 model I believe) I have had a failure every year. The first three years I got warranty coverage then the installer went out of business so I pay again and again.
I've replaced the blower motor two times; the low pressure switch; the draft inducer motor; the circuit board (which has apparently failed again so I'm looking to replace the furnace instead). The flame sensor needed cleaning every 6 weeks until one repairman jury rigged a non-standard sensor that really works about 4 years ago and the igniter was replaced a couple of winters back.
I added it up and I've payed for this furnace 3 times in 10 years. No More.
Date created: 2008-01-19
I have owned a Lennox G26 for 12 years and finally decided to give up on it. It has been nothing but trouble since the day it was installed and is in need of constant repair. Chose Trane this time because of consumer reviews.
Other G26 Reviews
Although many HVAC contractors support Lennox products online, some consumer posts reflect disappointment and frustration with the G26. A consumer on diychatroom.com finds the LED diagnostic lights not very useful when trying to diagnose a system error. Simple fixes, consumers say, are made more complicated because the lack of activity on the board.
A conversation thread on ytmag.com highlights repairs, failing components, and hard-to-deal with repairmen. Hvac-talk.com also has many repair questions about the G26. From faulty ignitions to blowing cold air, consumers are unsure how to fix the unit without calling a professional.
Question and Answer
What is the efficiency of the lennox G23Q3/4-100-2
The G26 is available in different models which vary in efficiency and capacity.