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09-18-2007, 04:45 PM
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#1
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2 Rivet Member
Join Date: Sep 2002
Posts: 32
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Suburban NT-30 woes
The Suburban NT-30 in my 1987 Sovereign was working yesterday but is not working today. The furnace will come on but blows cold air. The newly installed water heater works fine and I have plenty of propane. Any suggestions or thoughts on where to start with this problem would be appreciated. Thanks in advance.
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09-18-2007, 06:03 PM
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#2
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Rivet Master
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia
, New Mexico
Join Date: Feb 2005
Posts: 7,743
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I would start with the thermocouple which should have an output of about 27 millivolts. Other possibilities are the limit switch, anti sail switch, thermostat, circuit board.
Generally speaking I know enough to be dangerous and the innards of a furnace call for more technical expertise than the average Joe Handyman. You may save yourself some time and hassle, unless this is an easy diagnosis, of getting some help from a good RV guy. You don't necessarily need an Airstream tech as these furnaces are used in a lot of RVs
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
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09-18-2007, 06:30 PM
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#3
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Rivet Master
1976 25' Caravanner
Vintage Kin Owner
Campton
, New Hampshire
Join Date: Feb 2006
Posts: 1,113
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When was the water heater installed , yesterday ? Check the gas shut off valve to the furnace to see if it's open .
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09-18-2007, 06:48 PM
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#4
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3 Rivet Member
Join Date: Mar 2002
Posts: 114
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Furnace
I had a similar problem with my 85 Soverign furnace. After two trips to the shop (which cost almost as much as a new furnace), I replaced the furnace and have had no further problems.
__________________
1985 25' Sovereign
Corner Bed
2016 Suburban
Bellingham, WA
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09-18-2007, 07:02 PM
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#5
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Rivet Master
Commercial Member
New Borockton
, Alabama
Join Date: Sep 2002
Posts: 1,593
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I like Marshall's answer and I would probably check them in that order.
__________________
Randy...Converters, Inverters, Trimetric, Surge Protectors, Zamp, Smartplug, AGM Batts
888-828-1893
Bestconverter.com
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10-01-2007, 01:38 PM
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#6
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2 Rivet Member
Join Date: Sep 2002
Posts: 32
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Had my furnace bench tested and turns out it need's a new gas valve. Where is the best place too purchase a Suburban NT30SP?
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10-01-2007, 02:05 PM
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#7
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3 Rivet Member
1987 34' Limited
1987 34.5' Airstream 345
Tyler
, Texas
Join Date: May 2007
Posts: 110
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Suburban furnace
Hi! If you watch e-bay you can find a bargan on a new unit....I found mine for about 60% of retail + freight.
Pete
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10-01-2007, 02:21 PM
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#8
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2 Rivet Member
Join Date: Sep 2002
Posts: 32
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Thanks Pete
I been watching E-Bay,nothing interesting so far, Camping World has a good price if you are a club member but they say that the unit must be installed by a qualified tech.The search continues.
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10-01-2007, 02:26 PM
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#9
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4 Rivet Member
2012 31' Classic
1999 36' Land Yacht Widebody
Andalusia
, Alabama
Join Date: Dec 2005
Posts: 476
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Try PPL Motorhomes in Houston, TX.
They have some great prices on parts. Thats where I got my water heater, and my new rear furnace.
Rob
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10-01-2007, 03:38 PM
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#10
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Rivet Master
1976 25' Caravanner
Vintage Kin Owner
Campton
, New Hampshire
Join Date: Feb 2006
Posts: 1,113
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Quote:
Originally Posted by dano
Thanks Pete
I been watching E-Bay,nothing interesting so far, Camping World has a good price if you are a club member but they say that the unit must be installed by a qualified tech.The search continues.
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All part for appliances say that , depends what you are comfortable with doing yourself.
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10-01-2007, 04:12 PM
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#11
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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Quote:
Originally Posted by dano
Thanks Pete
I been watching E-Bay,nothing interesting so far, Camping World has a good price if you are a club member but they say that the unit must be installed by a qualified tech.The search continues.
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dano,
The 'qualified tech' designation refers to someone who is trained and licensed in the installation of propane gas appliances. This specifically refers to opening and then re-connecting the flair connection that feeds LP to the furnace. The rest of the install is a few screws, maybe attaching ducting if you have any and connecting 4 wires.
Believe me when I tell you that most RV Techs have no real training or licensing in the handling of LP gas (especially those working at Camping World!) like I have. There are some specifics about making flair connections, but with a replacement unit, there should be only one to make and all of the necessary connection materials are already in place. It's basically wrench off/wrench on.
It's your trailer, and if you feel confident in the replacement, by all means go for it! PM me if you have any specific questions about the install.
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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10-01-2007, 08:00 PM
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#12
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Rivet Master
1976 25' Caravanner
Vintage Kin Owner
Campton
, New Hampshire
Join Date: Feb 2006
Posts: 1,113
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Lewster
Thanks for your candid post , my opinion of at least one RV tech has gone way up .
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10-01-2007, 09:10 PM
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#13
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Desert Fox
1985 31' Sovereign
Tucson
, Arizona
Join Date: Jan 2004
Posts: 250
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Hi,
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10-12-2007, 07:54 PM
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#14
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2 Rivet Member
Join Date: Sep 2002
Posts: 32
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Thanks to everybody who replied, I bit the bullet and bought a new furnace, the install was pretty easy, just need to install the vent cap and I'm done.
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