Nt-22a

[Fishbone]

I finally got the 1967 Overlander I have been waiting for. Actually waiting on the title for 2 months. I thought the guy put me off because of the low offer I made.
Anyway, just got to checking the furnace and found a NT-22A, that is part of the infamous recall. The AS was a SW rig most of its life and the furnace has little or no use. No rust, ETC. I pulled it out and the high temp hose is cracked and has shrunk. I have searched for the fix, on the recall, and was not able to find a good description or picture to determine if it is something I want to do.
I see the hose is only part of the issue. The flange on the fan housing is shallow and does not make a very good connection even if the hose lines up perfectly. With the newer high temp adhesives and a new, longer hose receiver this could be corrected. The seal around the fan housing is old and cracked as well.
My question is should I even consider getting new hose (high temp marine) and putting the stove into service, with the obvious safety measures, co2 alarm. I have read many were repaired and put into service and were probably used for many years with no problem but I see many people on the forum are of the mind to replace it and don't mess with using it.

[Silverhobby]

Safety is the primary issue here. IF the hose can be found and IF it can operate without spewing carbon monoxide into the coach to KILL you. You'll have to be the one that makes these decisions. Don't be dead wrong. JM2$W

[TomW]

Originally Posted by phoney

... I pulled it out and the high temp hose is cracked and has shrunk. I have searched for the fix, on the recall, and was not able to find a good description or picture to determine if it is something I want to do.

Ya know, this recall has always bothered me. I researched it to death during my Overlander's refurb.

The hose in question is on the low pressure side of the furnace. A leak in it would mean the furnace is drawing air FROM where you are, and NOT blowing noxious fumes INTO the trailer. The high pressure side (burned propane) has no rubber parts in the way to where the gas exits outside. Search this forum long enough, and you will find I am not the first person to state this fact.

Tom Patterson used to, or still does, run a newsgroup where "Dr. Gerald" used to make great posts. He once described his recovery from near-death carbon monoxide poisoning. He did not have a carbon monoxide (CO) detector.

I have my original furnace. I saw surface cracks in the subject hose. I smeared high-temp RTV on the hose. I employ a calibrated CO monitor. I have yet to have a problem.

But you should replace your furnace if you feel the least bit uncomfortable with it.

Tom

[lewster]

REPLACE IT !!!!!!!

A few hundred bucks is not worth your life

[fotochop]

I had the same furnace and just chucked it. I'm camping with some irreplaceable cargo, though, also known as "my family" and am not willing to take the kind of crazy chances I took back in my fickle youth.... a forty year old furnace is just not something I'm comfortable sleeping with...especially one that was recalled decades ago..

[TomW]

Originally Posted by lewster

REPLACE IT !!!!!!!

What? Did you say something?


Tom

[richinny]

Originally Posted by lewster

REPLACE IT !!!!!!!

A few hundred bucks is not worth your life

lew, tell us how you really feel about it!

i agree, if you want to take a risk, walk on the roof.

[63Silver]

OK, this thread is making me a little nervous. I have a 63 model, what should I be looking for to see if I have one of the recalled furnaces? We have not used the furnace yet but plan to this fall.

63silver

[Fishbone]

Go to this web site and you will see the only photo I saw. Where Tom points out the difference is where you should look for a short rubber hose between the fan and the main housing.
1967 Airstream Overlander

He also list's the model affected.

[Fishbone]

Does anyone know what the corrective action Suburban took on this recall?

[Smokin Camel]

Why take a chance on a 30 year old furnace. Too many things other things can go wrong. Many parts such as heat exchangers deteriorate over time. Speaking for myself, I wouldn't use it. A couple hundred bucks is cheap when you consider what may happen.

I ditched my old furnace when I got my AS a few years ago, just because of age. It was my first major project. I have access to a high grade CO detector (freind is a Steamfitter/Control Specialist) and I did not even bother to check it out. The first thing that entered my mind is 30+ years of corrosion on the heat exhanger. When Propane burns, water is one of the bi-products. There is always some residual on the exchanger. The exchangers are generally nothing more than high grade sheet steel. To the best of my knowledge they are not designed with a 30 year life in mind. 20 maybe, but 30? How often was it serviced? Even if it is good at the moment, an exchnager that old could perforate at any time.

As was said before....DON'T DO IT!

[Fishbone]

Thanks to all! I am a believer. The furnace goes.

[lewster]

Originally Posted by phoney

Thanks to all! I am a believer. The furnace goes.

[Silverhobby]

phoney, It will be money well spent in the long term. Many happy camping experiences await.... Enjoy...

[wkerfoot]

Originally Posted by TomW

Ya know, this recall has always bothered me. I researched it to death during my Overlander's refurb.

The hose in question is on the low pressure side of the furnace. A leak in it would mean the furnace is drawing air FROM where you are, and NOT blowing noxious fumes INTO the trailer. The high pressure side (burned propane) has no rubber parts in the way to where the gas exits outside. Search this forum long enough, and you will find I am not the first person to state this fact.

Tom Patterson used to, or still does, run a newsgroup where "Dr. Gerald" used to make great posts. He once described his recovery from near-death carbon monoxide poisoning. He did not have a carbon monoxide (CO) detector.

I have my original furnace. I saw surface cracks in the subject hose. I smeared high-temp RTV on the hose. I employ a calibrated CO monitor. I have yet to have a problem.

But you should replace your furnace if you feel the least bit uncomfortable with it.

Tom

Tom,

The list is still alive and well. The sign up page is here: Vintage Airstream List Index Page

There are different members of that list and I find them to be quite valuable. BTW, I know that I am not the only one on Tom's List who is a contributer here.

Bill