Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-24-2012, 04:05 PM   #1
Rivet Master
 
TG Twinkie's Avatar
 
1974 Argosy 26
Morrill , Nebraska
Join Date: Nov 2009
Posts: 5,140
Images: 2
Blog Entries: 5
Suburban NT 22c Furnace

I know this is one of the units on the recall list. My question is. If back in the '70's when these units were recalled. Did Suburban have a fix? If the owner of such a unit took it back on the recall. Did Suburban make the necessary repairs to the crossover pipe problem?
I recently removed the unit from my trailer and did a thorough checkout of the components including the crossover pipe. I understand that some units had a rubber crossover pipe and others had a metal pipe. My unit has a rubber type crossover and it is in exceptionally good shape. There is no sign of dry rotting or cracking of any type. It fits tight at both ends and has what I would consider good flexibility. The wall thickness must on this piece of hose (pipe) is close to 3/16".
The heat exchanger and plenum are in great shape with very little surface rust. What rust is there can be wiped of with a cloth and the surface below it shows no signs of pitting or deep erosion.
The unit fires up and runs great. It has done a good job of heating the trailer. It is a simple unit with no electronics. One does have to light the pilot, which is relatively easy to do. And it is a very quiet unit.
Has anyone else found this to be the case with these old furnaces? Does anyone know when the last NT22c was made and if Suburban may have updated some units before they left the factory? The serial number on this unit fits within the recall list.
Since the unit is in great shape I plan to continue to use it. Of course I have CO and smoke alarm detection installed.
Any and all input would be appreciated.
__________________

__________________
Knowledge: "A gift to be shared. A treasure to receive."
TG Twinkie is offline   Reply With Quote
Old 01-25-2012, 09:22 AM   #2
Rivet Master
 
silverleeper's Avatar
 
1967 22' Safari
1960 Caravel
Edmonds , Washington
Join Date: Aug 2004
Posts: 2,499
Images: 8
This is a good read. Suburban furnace
__________________

__________________
Lee

1973 F-250 4X4 390
1965 Chevy Suburban 454
AIR 6030
WBCCI 4258
TCT

silverleeper is offline   Reply With Quote
Old 01-25-2012, 09:37 AM   #3
Addicted
 
exthemius's Avatar
 
1971 27' Overlander
Currently In: Skowhegan , ME
Join Date: Jul 2010
Posts: 703
Images: 16
You know..I'll probably get heat (no pun intended) for this, but we've kept ours and use it all the time...and I'm with you on how simple they are to start, operate, and maintain. I've read a lot of stories here where the control boards go out and have to be replaced, and this and that...I've completely rebuilt ours from the ground up because of a dirt-dauber nest being built inside the blower unit. We don't have the recalled unit (we have the metal tube in ours) but everything else works great and we have no hesitation in using it until it doesn't work anymore (although I only wish it were a bit smaller so that I could easily fit a new range/oven combo in my galley).

Since I've rebuilt the unit and gotten everything re-balanced (that was hard) I've not had a single problem with it in a year and a half, and we use it all the time!
__________________
-Shawn
------------------
TAC OK-42

Visit our crazy full-timing blog (us,kids and dogs living the dream): http://www.airstreamingdreaming.com/

Join us at the TAC Walt Disney World Rally, November 4th - 10th, 2012: http://www.theairstreamersclub.org/rallies/tac-fw-wdw
exthemius is offline   Reply With Quote
Old 01-25-2012, 11:06 AM   #4
Rivet Master
 
cameront120's Avatar
 
1972 25' Tradewind
North Vancouver , British Columbia
Join Date: Feb 2006
Posts: 3,422
Images: 23
Shawn, you aren't alone. I've been using mine without issues. My records indicate that the original order had the problem fixed during the recall.
__________________
Cameron & the Labradors, Kai & Samm
North Vancouver, BC
Live! Life's a banquet and most poor suckers are starving to death! - Mame Dennis
cameront120 is offline   Reply With Quote
Old 01-25-2012, 11:53 AM   #5
Rivet Master
 
1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
Join Date: Jul 2009
Posts: 4,591
Quote:
Originally Posted by TG Twinkie View Post
I know this is one of the units on the recall list. My question is. If back in the '70's when these units were recalled. Did Suburban have a fix? (snip) My unit has a rubber type crossover and it is in exceptionally good shape. There is no sign of dry rotting or cracking of any type. It fits tight at both ends and has what I would consider good flexibility. The wall thickness must on this piece of hose (pipe) is close to 3/16". (snip)
Yes, Suburban had a recall program and would replace the rubber crossover tube with one with a RED stripe on it. So, if yours has a Red stripe on the rubber crossover, it has the recall modification, or was made after the recall was instituted. In theory, after someone made the modification, there was a label placed on the furnace stating that it had been done. But you know how labels disappear, or were not put on to begin with.

I understand Suburban no longer supports any parts from these units, including the recall parts and tube. I know that parts for the pilot light, including the orifice, are very difficult to come by, as only NOS sources may have them. Gaskets were asbestos and are not available now, but there may be some alternative materials you can use.

I agree, it was a nice simple unit, and exceptionally quiet compared to the newer ones available now. New ones, however, have lower 12volt current draw.

If you have yours apart, remove the cast iron burner assembly and run a hacksaw blade through each of the slot openings in the burner. They tend to rust up over the years and then do not burn right, no matter how much you adjust the air input to the burner.
__________________
idroba is offline   Reply With Quote
Old 01-25-2012, 12:56 PM   #6
Rivet Master
 
BIGED52's Avatar
 
1967 22' Safari
MILAN , Illinois
Join Date: Dec 2004
Posts: 1,890
Good Info here!

Quote:
Originally Posted by idroba View Post
Yes, Suburban had a recall program and would replace the rubber crossover tube with one with a RED stripe on it. So, if yours has a Red stripe on the rubber crossover, it has the recall modification, or was made after the recall was instituted. In theory, after someone made the modification, there was a label placed on the furnace stating that it had been done. But you know how labels disappear, or were not put on to begin with.

I understand Suburban no longer supports any parts from these units, including the recall parts and tube. I know that parts for the pilot light, including the orifice, are very difficult to come by, as only NOS sources may have them. Gaskets were asbestos and are not available now, but there may be some alternative materials you can use.

I agree, it was a nice simple unit, and exceptionally quiet compared to the newer ones available now. New ones, however, have lower 12volt current draw.

If you have yours apart, remove the cast iron burner assembly and run a hacksaw blade through each of the slot openings in the burner. They tend to rust up over the years and then do not burn right, no matter how much you adjust the air input to the burner.

Thanks for posting the info on the crossover tube w/red stripe. Until now I thought the Suburban Factory Mod was the adjustable metal sleeve. I am stll working on a replacement crossover tube that seals on the ends and is safer than the original rubber one. Ed
__________________
1967 Safari Twin "Landshark" w/International trim package
1999 GMC Sierra 1500 SLT
FORUMS MEMBER SINCE 12/16/2004AIR#7110
"My tire was thumping, I thought it was flat. When I looked at the tire, I noticed your CAT!" Burma Shave
BIGED52 is offline   Reply With Quote
Old 05-17-2015, 05:17 PM   #7
Rivet Master
 
Gearheart's Avatar

 
1973 Argosy 24
Kitchener , Ontario
Join Date: Jun 2014
Posts: 853
Images: 1
just marking this to find again
__________________

__________________
Gearheart is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cleaning and Refurbishing My Suburban NT-35K Furnace Steve Bryant Furnaces, Heaters, Fireplaces & Air Conditioning 38 02-25-2013 10:50 PM
1988 Suburban Furnace vhariable Furnaces, Heaters, Fireplaces & Air Conditioning 2 11-14-2011 12:30 AM
Suburban furnace problems? New NT-30... edglenn Furnaces, Heaters, Fireplaces & Air Conditioning 13 11-10-2011 09:16 PM
Suburban furnace replacement for '66 Trade Wind Ben in MT Furnaces, Heaters, Fireplaces & Air Conditioning 0 05-17-2011 09:12 PM
Suburban Furnace Selection MDSilverado Furnaces, Heaters, Fireplaces & Air Conditioning 3 01-31-2011 10:40 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:10 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.