Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-09-2003, 07:50 PM   #1
2 Rivet Member
 
Paul Daugherty's Avatar
 
Join Date: Mar 2002
Posts: 49
Images: 2
Furnace problem

My furnace heats well but when it is below 40 degrees the fan just runs and runs. The thermastat has been replaced. It seems to run to long after the flame is out. When it cycles the furnace goes on and off but the fan keeps running. This is a suburban furnace in a 84 Airstream. Any one ever take one apart and fix it themselfs.
Paul D...
__________________

__________________
Paul Daugherty is offline   Reply With Quote
Old 02-10-2003, 10:43 PM   #2
2 Rivet Member
 
evan's Avatar
 
Join Date: Jan 2003
Posts: 68
Images: 5
I had this same problem with the furnace in a AS trailer. It turned out to be a bad circuit board that had to be replaced. The circuit board controls a complex series of feedbacks and switches between thermostat, the fan motor, sensors etc. The fan also purges the the combustion chamber of unspent gas before it shuts down. Purhaps you have a bad gas valve or the flame sensor is bad? Also check the fan relay, it could be sticking. Good luck.
__________________

__________________
evan is offline   Reply With Quote
Old 02-11-2003, 09:28 PM   #3
Rivet Master
 
wb13798's Avatar
 
2004 28' Classic
Currently Looking...
huntsville , Alabama
Join Date: Jul 2002
Posts: 866
Images: 1
had the same problem last year. replaced the lower limit switch/sensor and cleared the problem. take the front cover off it is on the bottom right . push on it and it will click. probably sticking. the furnace has to run for a while to cool down the the burner chamber then cuts the blower off. lol
al
__________________
wb13798 is offline   Reply With Quote
Old 02-11-2003, 09:41 PM   #4
Rivet Master
 
wb13798's Avatar
 
2004 28' Classic
Currently Looking...
huntsville , Alabama
Join Date: Jul 2002
Posts: 866
Images: 1
paul
i will post a jpg tomorrow for you it is probably sticking and clicking may clear that problem it did on mine but i replacef the switch any way. to click just push in till it clicks. mine got soo bad it only would malfunction at 2 in the morning and it was blowing cold air. this temp sensitive switch turns the blower motor off.
al
__________________
wb13798 is offline   Reply With Quote
Old 02-12-2003, 09:54 PM   #5
Rivet Master
 
wb13798's Avatar
 
2004 28' Classic
Currently Looking...
huntsville , Alabama
Join Date: Jul 2002
Posts: 866
Images: 1
paul
sorry but thw digital is on the blink. do you have a manual ??? if not TAKE THE FRONT COVER AND look on the lower right and you will see a silver crome looks like a button push and you will hear a lick that iS the switch. if it still doesnt cut the blower OFF.on the cool down cycle in a reasonaBLE TIME REPLACE IT. IT IS NOT A HIGH DOLLAR PART. it is a pain in the --- to replac. the god part is you dont have to remove the furnace. lol
al
__________________
wb13798 is offline   Reply With Quote
Old 02-13-2003, 04:05 PM   #6
2 Rivet Member
 
Paul Daugherty's Avatar
 
Join Date: Mar 2002
Posts: 49
Images: 2
I don't think I have the same thing or type of furnace. I will send a picture today if I can. Thanks for the help

Paul Daugherty.
__________________
Paul Daugherty is offline   Reply With Quote
Old 02-13-2003, 04:21 PM   #7
2 Rivet Member
 
Paul Daugherty's Avatar
 
Join Date: Mar 2002
Posts: 49
Images: 2
Here is a pic of my furnace. I do you have the same kind and year.
Paul
Sorry I can't figure out how to send a pic in this forum I need Help
Paul
__________________
Paul Daugherty is offline   Reply With Quote
Old 02-13-2003, 05:53 PM   #8
Rivet Master
 
wb13798's Avatar
 
2004 28' Classic
Currently Looking...
huntsville , Alabama
Join Date: Jul 2002
Posts: 866
Images: 1
paul
are you going to mystic springs??? i have a suburban nt-30sp . and that is the furnace that airstream put in everything that was close to 30 ft. im planning on going and if you are there ill put my finger on it.. and click it.. lol al

to post a picture go to attach file (below/options) and click on browse and a window (my computer/documents) should come up for you to select and identify the picture file. below the brousetab . list the files that the server will accept. hope that helps.
__________________
wb13798 is offline   Reply With Quote
Old 02-13-2003, 06:12 PM   #9
2 Rivet Member
 
Paul Daugherty's Avatar
 
Join Date: Mar 2002
Posts: 49
Images: 2
Its an 82 not an 84 AS. My mistake
Attached Images
 
__________________
Paul Daugherty is offline   Reply With Quote
Old 02-14-2003, 06:17 PM   #10
Rivet Master
 
wb13798's Avatar
 
2004 28' Classic
Currently Looking...
huntsville , Alabama
Join Date: Jul 2002
Posts: 866
Images: 1
ok looks like mine. on the left side above the wire connection is the sight glass for looking at the flame. on the right side above the gas line is a switch (looks like another sight glass) not so it is the switch i have been telling you about push it it should click if it doesnt dont worry just wait untill you use the furnace again and see if it made a difference if it didnt open the door again while it is warm not hot and push it again. mine is cold and wont click i think it has to be warm to click . in any case you have unstuck if it was stuck. next question when the blower is running is the air warm or cold. if cold the switch is probably bad. if warm dont worry about it. be happy. lol
al
__________________
wb13798 is offline   Reply With Quote
Old 02-14-2003, 10:01 PM   #11
Rivet Master
 
ALANSD's Avatar

 
1966 26' Overlander
Woodstock , Georgia
Join Date: Feb 2002
Posts: 8,462
I have the same furnace. Another thing to look at is the color of the flame, to be sure it is getting enough air. It should be nice a blue when you look thru the site glass or in from the outside of the motorhome. If it is too orange or yellow, the air vlave on the side needs adjustment. It screws in and out. Also i was advised to clean out the air intake tube really well from the outside to be sure it isn't blocking the air flow. Mine has a new igniter, but the air adjustment is now in as far as it will go and although the flame is mostly blue...I have no adjustment left.
Also there was a good thread here on checking your gas pressure to be sure it is high enough.
The furnaces do get burnt inside the chamber and need cleaning, although I haven't yet attempted that one.
__________________
ALANSD is offline   Reply With Quote
Old 02-15-2003, 07:36 AM   #12
2 Rivet Member
 
Paul Daugherty's Avatar
 
Join Date: Mar 2002
Posts: 49
Images: 2
I did check the flame it is nice and blue, but where is that adjustment screw you mentiond? I did clean the heat and gas exaust (the one on top). It had two mud dobber nests in it. The lower hole (air intake) Has a screen on it. From other post I have read that screen is not standard issue on a suburban furnace. Their web site does not recomend them. But if they don't recomend it then how do you keep the mud dobbers and other pest out? (Geroge is getting frustrated)

Paul....
__________________
Paul Daugherty is offline   Reply With Quote
Old 02-15-2003, 04:00 PM   #13
Rivet Master
 
ALANSD's Avatar

 
1966 26' Overlander
Woodstock , Georgia
Join Date: Feb 2002
Posts: 8,462
if you pull off that little cover under and to the right of the wires the two screws come off....there is an adjustment inside there.
__________________
ALANSD is offline   Reply With Quote
Old 02-15-2003, 07:18 PM   #14
2 Rivet Member
 
Larry Brown's Avatar
 
Join Date: Jun 2002
Posts: 58
Images: 9
the fix

I have the same unit it started to act the same . I did a cheak of all the components with an ohm meter and found an open coil on the relay.that fixed the problem for 1 year.the next season the furnace did the same thing again.I replaced the thermostat. it fixed the cycling again. But the problem came back .So I purchased a new circut board. Promblem solved ? tell next season .Than I called the R.V. gas appliance repair shop .For 30 bones they tested the whole system on test station and fixed the problem with a gaurantee.
__________________

__________________
Larry Brown 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
furnace problem nwclassic Furnaces, Heaters, Fireplaces & Air Conditioning 10 01-12-2007 12:15 AM
Surburban Furnace Ills - HELP Cat Furnaces, Heaters, Fireplaces & Air Conditioning 22 07-07-2005 08:22 AM
R & R a Suburban Furnace Janets Husband Furnaces, Heaters, Fireplaces & Air Conditioning 3 06-24-2004 08:19 PM
Furnace problem, Real technical. Navigator Furnaces, Heaters, Fireplaces & Air Conditioning 7 02-03-2004 10:31 PM
furnace problem..... norbert Furnaces, Heaters, Fireplaces & Air Conditioning 12 11-17-2003 09:50 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:01 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.