Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-07-2010, 07:38 AM   #1
1987 Excella 32'
 
1987 32' Excella
Kennewick , Washington
Join Date: Sep 2009
Posts: 14
Suburban nt-30SP will not start

December 7, 2010

December, 2009, I installed a new suburban nt-30sp furnace in my 1987 Airstream Excella 1000 travel trailer. It worked fine until it quit when I ran out of gas while it was operating. After refilling the propane bottles, the furnace would not come on – that is, I could hear the thermostat “click” but the furnace did nothing – no fan, nothing.


I had a repair facility look at it and they said that my pressure regulator was faulty and not providing enough pressure, even though the other appliances worked fine (stove, oven, refrigerator, hot water heater). But the new pressure regulator seemed to fix the problem as the furnace once again worked fine – until now. I have once again run out of propane and, after filling both tanks, the furnace will not come on just as previously stated. No fan, nothing!


Is there some procedure to reset a safety feature when this happens? I don’t have a gage to check the actual pressure but once again, all other appliances are working fine.
__________________

__________________
bmccomb is offline   Reply With Quote
Old 12-07-2010, 07:51 AM   #2
Site Team
 
Aage's Avatar
 
1974 31' Sovereign
Ottawa , ON
Join Date: May 2008
Posts: 11,204
Images: 25
On our TT, if a tank is removed and re-installed, we have to be patient to get the furnace re-lit. It helps to start the cooktop (all four burners) for a few seconds. It might still take many clicks of the lighter to get the pilot lit though.

I think that it's air in the line that needs to be exhausted...
__________________

__________________
“Courage is being scared to death, but saddling up anyway.”
...John Wayne...........................
Aage is offline   Reply With Quote
Old 12-07-2010, 07:59 AM   #3
Rivet Master
 
tkasten's Avatar
 
1965 22' Safari
Vassar , Michigan
Join Date: Jun 2009
Posts: 847
Images: 6
Furnace no start

I had the same experience with my new Suburban NT 30. It took about 20 start up cycles before it fired. I now turn both tanks on with the lever pointed to one tank. When that tank goes empty the regulator automatically switches to the other tank. I can check the first tank as it shows red on the indicator. I then turn the indicator over to the tank that is running and then take the empty tank in for refill. This way my tanks will not go empty with the furnace in the middle of a cycle. By the way I also had the same problem if I shut the furnace down in the middle of a burn.
Hope this helps.
__________________
Tim
TAC MI 14

Everyday is a Saturday
tkasten is offline   Reply With Quote
Old 12-07-2010, 08:18 AM   #4
x
 
XXXX , XXXX
Join Date: Jun 2010
Posts: 2,601
Quote:
Originally Posted by tkasten View Post
I had the same experience with my new Suburban NT 30. It took about 20 start up cycles before it fired. I now turn both tanks on with the lever pointed to one tank. When that tank goes empty the regulator automatically switches to the other tank. I can check the first tank as it shows red on the indicator. I then turn the indicator over to the tank that is running and then take the empty tank in for refill. This way my tanks will not go empty with the furnace in the middle of a cycle. By the way I also had the same problem if I shut the furnace down in the middle of a burn.
Hope this helps.
NEVER NEVER NEVER run your propane system without both tanks attached. Yes the switchover regulator should not leak but you are leaving a line open with a tank open. This is a huge potential for a serious propane leak. If you want to run your system like this while filling the empty tank attach a third tank to the line. You can use the tank from your BBQ or any empty tank.
__________________
wasagachris is offline   Reply With Quote
Old 12-07-2010, 08:24 AM   #5
Rivet Master
 
tkasten's Avatar
 
1965 22' Safari
Vassar , Michigan
Join Date: Jun 2009
Posts: 847
Images: 6
wasagachris - You are right. I did not mention that I wait until the furnace cycles off, shut system down and then fill tank. Everyone knows what happens when I "assume".
__________________
Tim
TAC MI 14

Everyday is a Saturday
tkasten is offline   Reply With Quote
Old 12-07-2010, 08:26 AM   #6
x
 
XXXX , XXXX
Join Date: Jun 2010
Posts: 2,601
Quote:
Originally Posted by bmccomb View Post
December 7, 2010

December, 2009, I installed a new suburban nt-30sp furnace in my 1987 Airstream Excella 1000 travel trailer. It worked fine until it quit when I ran out of gas while it was operating. After refilling the propane bottles, the furnace would not come on – that is, I could hear the thermostat “click” but the furnace did nothing – no fan, nothing.


I had a repair facility look at it and they said that my pressure regulator was faulty and not providing enough pressure, even though the other appliances worked fine (stove, oven, refrigerator, hot water heater). But the new pressure regulator seemed to fix the problem as the furnace once again worked fine – until now. I have once again run out of propane and, after filling both tanks, the furnace will not come on just as previously stated. No fan, nothing!


Is there some procedure to reset a safety feature when this happens? I don’t have a gage to check the actual pressure but once again, all other appliances are working fine.
Gas pressure will have no effect on your 12VDC suppiled to the furnace. It should try to light by running the fan first, then open the gas valve and start trying to ignite the gas (fan comes on, 30 seconds later loud clunk of gas valve opening at furnace followed by a series of smaller clicks as the ignitor tries to light the gas. The furnace should try to do this three times before the circuit board goes into lockout mode. This already may have happened). At the thermostat turn the furnace switch right off by lowering the control for temperature all the way down until you can feel it click into the off position. Wait 30 seconds and turn the furnace on again and see what happens. If this does not work you have some other problem and without more information cannot be properly assessed here by computer.
__________________
wasagachris is offline   Reply With Quote
Old 12-07-2010, 08:31 AM   #7
x
 
XXXX , XXXX
Join Date: Jun 2010
Posts: 2,601
Quote:
Originally Posted by tkasten View Post
wasagachris - You are right. I did not mention that I wait until the furnace cycles off, shut system down and then fill tank. Everyone knows what happens when I "assume".
No problem Tim I feel better now knowing that you are doing it right. I just had to mention it in case others tried this and left the system open. I was imagining airstreams all over the place blowing up!
__________________
wasagachris is offline   Reply With Quote
Old 12-07-2010, 11:50 AM   #8
Full Timers/Diesel power.
 
Mike Leary's Avatar
 
1983 31' Airstream310
Cactus Hug , Arizona
Join Date: Mar 2007
Posts: 2,540
Images: 11
It has to be a electrical problem, no matter what the condition of the propane is, it'll at least fire the fan. Bad wiring (an intermittent short somewhere) or the card could be the problem. Suburban cards are infamous for failing.
If it is the card, don't replace it with a Suburban.
__________________
"A settled wisdom, plus the itch to be elsewhere"
Mike Leary is offline   Reply With Quote
Old 12-07-2010, 01:46 PM   #9
Rivet Master
 
Silverhobby's Avatar
 
1967 26' Overlander
1968 30' Sovereign
Vintage Kin Owner
Currently Looking...
Mosheim , Tennessee
Join Date: Feb 2005
Posts: 1,301
Send a message via Yahoo to Silverhobby
Mike, by saying "card" are you referring to the Suburban circuit board?
__________________
Silverhobby is offline   Reply With Quote
Old 12-07-2010, 03:06 PM   #10
Full Timers/Diesel power.
 
Mike Leary's Avatar
 
1983 31' Airstream310
Cactus Hug , Arizona
Join Date: Mar 2007
Posts: 2,540
Images: 11
Quote:
Originally Posted by Silverhobby View Post
Mike, by saying "card" are you referring to the Suburban circuit board?
Yes, they are junk. Every appliance we have has had the cards replaced with "Dinosaur", which are far and away, superior. Even if it was warranty, I'd have a Dinosaur card installed. Check to see if the thermostat is working by connecting the wires together, by the way. Could be a faulty fuse connection, also.

Dinosaur Electronics Home. High quality circuit boards for RV appliances.
__________________
"A settled wisdom, plus the itch to be elsewhere"
Mike Leary is offline   Reply With Quote
Old 12-08-2010, 06:44 AM   #11
1987 Excella 32'
 
1987 32' Excella
Kennewick , Washington
Join Date: Sep 2009
Posts: 14
Thanks everyone for a very informative discussion. I've also heard from Suburban and they feel it is a furnace problem and, since it is still under warranty, I'll be calling in a mobile tech to take a look. The circuit card angle seems the most likely.

Thanks again,

Bruce McComb
__________________
bmccomb is offline   Reply With Quote
Old 12-08-2010, 08:41 AM   #12
Full Timers/Diesel power.
 
Mike Leary's Avatar
 
1983 31' Airstream310
Cactus Hug , Arizona
Join Date: Mar 2007
Posts: 2,540
Images: 11
Let us know what happened, Bruce. I've prolly spent more on our Suburban than I've spent on our dog, which is saying something!
__________________
"A settled wisdom, plus the itch to be elsewhere"
Mike Leary is offline   Reply With Quote
Old 12-08-2010, 02:55 PM   #13
1 Rivet Member
 
1969 31' Sovereign
Hadensville , Virginia
Join Date: Nov 2010
Posts: 9
I'm having problems with our NT 30SP too. We just bought the trailer a couple months ago, and the price was right enough that I wasn't too worried about the status of the furnace, and the owner wasn't sure if it worked or not. But it'd be nice if it worked and I've been trying to solve the problem with it - the blower comes on, but it never lights. I don't feel as if its a gas problem, but if it hadn't been used could there be air in line? We've been using cook top just fine.
I'm wondering how to test the voltage that is actually getting to the furnace, because I pulled out the fridge to patch the floor and see the wires coming from the thermostat are worn bare in a spot where it enters the wall. I read that it could lose voltage prohibiting the sail switch from ever connecting?? It sure does sound like its blowing enough to do the trick, but what do I know.
Any troubleshooting hints for us? I hate to take the darn thing anywhere, it doesn't tags but I really don't want to pull the furnace out unless I'm sure its busted. I'm sure a housecall if they even do that would be expensive. Maybe there is something simple I'm overlooking.
I'm new to airstream as well as this forum, but i've been learning here and there by following some threads.
....um.. and the kicker is we're actually living in the airstream currently and it's getting to be a bit chilly. We've been using a kerosene heater while we're there, but coming home to a chilly bed is no fun. We're in the slow process of renovating an old house so we have it parked on the land. Figured that we'd save money not renting somewhere for the long and expensive process and its nice to be on site. And it gave us an excuse to use what little money we did have on an airstream. Its me, my hubby, and our dog.
Any help and expertise is most appreciated.

Betsy
__________________
bootsie c is offline   Reply With Quote
Old 12-08-2010, 04:41 PM   #14
x
 
XXXX , XXXX
Join Date: Jun 2010
Posts: 2,601
Betsy can you describe exactly what you can hear once the fan comes on.It should try to light by running the fan first, then open the gas valve and start trying to ignite the gas (fan comes on, 30 seconds later loud clunk of gas valve opening at furnace followed by a series of smaller clicks as the ignitor tries to light the gas. The furnace should try to do this three times before the circuit board goes into lockout mode.
Can you here all three things, fan, gas valve clunk, and ignitor clicks?
__________________

__________________
wasagachris 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
How to start a Suburban Furnace Steve Lou Furnaces, Heaters, Fireplaces & Air Conditioning 9 04-07-2015 08:46 AM
Pix of Suburban NT-30sp replacing NT22 fotochop Furnaces, Heaters, Fireplaces & Air Conditioning 29 02-24-2012 02:46 PM
Suburban NT-30SP installation tip Starscream Furnaces, Heaters, Fireplaces & Air Conditioning 7 10-25-2010 05:01 AM
Suburban furnace where to start? Pacerized Furnaces, Heaters, Fireplaces & Air Conditioning 37 09-12-2009 01:36 PM
blower of suburban does not start when cranking up thermostat turfclubroad Furnaces, Heaters, Fireplaces & Air Conditioning 13 09-11-2009 01:38 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:47 AM.


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.