Saw this video late last year. Online with Carrier and extended heat exchanger warranty offered, knew it was time. Mine in that series. Had to calm the wife down. All new American Standard with Trane labels all over the equipment, two weeks ago.
That series of Carriers was famous for bad heat exchangers. I’m thinking the secondaries were too small in there passages. There was nothing good about these units. Thanks for sharing Theodore, have a Merry Christmas 👍👍🇨🇦
Were they the ones that had polypropylene coated secondaries! The plastic would break down and flake off and clog! I replaced a ton of those units,not with a Carrier product! Funny thing is,the numbers were always just outside of the recall units!
@@petersmart1999was there an estimated btu range and manufacturing date range where they used this polypropylene lining on the secondary? Or did they just throw these in all their high efficiency furnaces back in the day
I bought a house back in 2003 with one of those furnaces and the two speed reversing compressor. Sold the house three years later without any system issues. Agree Mr. Carrier’s successors were not quite up to speed with Trane and others. Carrier’s predecessors might have been ceiling fan guys. I think Egyptians and Persians had “wet rag” swamp coolers - perhaps with one or two manpower variable capacity air handlers.
I have changed out a few Carrier secondary heat exchangers under warranty! They are a pain! Al the labor it makes more sense to replace the furnace! Great video!
I remember reading this book that had documentation of all the units from 1970 to present and what, why and where the heat exchangers failed. Amazing literature! Pretty sure this unit was in there. Thanks for sharing.
I just happened to drive past your shop earlier today, and I saw the damage from the busted Watermain. I can’t believe all the damage! I hope between the city and insurance they make it right for you! Wishing you well.
@@BeautifulAngelBlossomwhat quality? also, not helped by poor duct work, low airflow cfm or near zero restriction and no static pressure. also improper gas pressure/combustion, maybe lack of propane pressure switch and low on gas(carbon/soot coking/corrosion). been to busy to watch all the folks I was watching, and MIHG is down (the old fashioned browser favorites list, by order of me finding/watching over the years). I don't subscribe to anyone and hate notifications, while I try to jump around randomly and watch a mix, it's hard to humanly be so random with limited time. also google playing around and forcing more ads, means I end up pausing or closing and doing other things or just walking away and forget about it. nothing personal to anyone I've watched/commented on/drifted away from over the years. my comments are always a mixed bag, some helpful/improving/joking/maybe wrong maybe right or just worded poorly(not a teacher/professor). end novel, to much flapping of the gums(fingers)
The 48 inch 58SX models suffered from what was called wimpy inducers. United Technology , for the new 40” Team 40 furnaces had Pratt and Whitney design the venter and it moved too much air. My 58MVP060 is vented in 1-1/2” pvc. That’s a problem, now that I’m associated with Trane. However I did get the heat exchanger replaced by the company were I once worked. Hopefully good for another 25 years.
Ted cook the cowboy of HVAC. I like that white camaro in your shop, you should pull that outside and do a walk around video. When you were taking that furnace apart I've never seen you move so fast.
Based on some info I got, those secondary heat exhangers had an internal coating that fails over time. Generally around here they corrode through and start leaking condensate.
For the amount of labor and how heavy they are I never worth replacing them unless around only 10 years old or around that . We up the price from 800 couple years ago to 2200 and quit replacing so many. My back is great full
Run into carrier bad heat exchangers almost once a week. 1996 surprised made it that long. Normally would of gone bad twice that old. We can't use flex gas lines either , would fail code
I think there might be another class action lawsuit against a certain company who shall not be named, this time due to the primaries rotting out early. The last run back before it goes into the secondary has too many ups and downs and GREATLY drops the temperature causing condensation in the primary. Hits LP harder than NG, one LP furnace has now had 2 failures in less than 10 years. And it is not improper installation or commissioning.
Serious question though, Ted if there is already an existing combustion air Inlet why not reuse it? I notice you just use combustion air from the inside Space on your jobs usually but why not hook up to what's existing here?
@@TedCookHVAC The ones where you didn't have any music you just went straight into the video basically three videos back Thank you for responding I've watched all of your videos I believe I've commented on all of them and this is the only one you've replied to
After 2011, they started making them out of stainless steel. I don't believe they changed anything other than the material. The previous design was made out of polypropylene-coated mild steel. The biggest issue with the previous design was that the sulfur in the fuel would not be consumed by combustion and would be carried into exhaust gasses. When the exhaust gasses condensed into condensate within the secondary heat exchanger, the sulfur would be transformed into sulfuric acid. While polypropylene is fairly resistant to lower concentrations of sulfuric acid at low temperatures, it is not very resistant to sulfuric acid at higher temperatures or with higher concentrations of sulfuric acid. And of course the mild steel that the polypropylene is supposed to protect is not at all resistant to chemical attack and will quickly start rusting once the polypropylene coating is compromised. The whole process is more complicated than this and involves a negative feedback cycle that accelerates as the secondary heat exchanger damage accumulates. If you're curious, you can easily find reports that go into detail on this via google.
looked like the "old" appliance/furnace connector flex pipe was reused, it's wise to always replace them with new when changing the unit or repairing anything gas related. further cover your hind quarters, by replacing them! 😉 that and the gas shutoff valves and make sure it's documented on invoice/contract. I'm no lawyer, but I've seen and heard lots of tales over the years, it's rather cheap insurance, compared to majority of lawsuit outcomes, even when found no fault of yours(god forbid something bad should ever happen).
That seems to be the main results when society is so selfish about exhaust fumes. There is just so much you can do to prevent excess CO and NOX before your sweet invention becomes a contraption that dupes the public's money and trust. As we invent, research and progress, machines, equipment etc. are supposed to get better in function and longevity not worse.
What are you talking about? This is a condensing furnace, the secondary heat exchanger is necessary to get the high efficiency. You can buy 80% furnaces still, those don't have a secondary. 26 years out of a furnace is actually pretty damn good.
