Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-28-2006, 08:30 AM   #1
Rivet Master
 
1979 31' Excella 500
Detroit Area , Michigan
Join Date: Jul 2004
Posts: 498
Images: 43
Dam furnace lock out!

Well I have the original Suburban furnace in my 1979 Airstream. Was having problems with the furnace getting into lockout mode when I let it run all night where I would find it the next day running with the blower on but with no heat.

Took the whole thing of of the trailer, blew everything out. Sail switch checked out just find and was freely swinging. The rest of the furnace seems to be in good shape. The exchanger seems to be solid. Replaced ignitor/flame sensor. Put back together. Ran it overnight the first night on battery only and it worked perfectly. I was estactic.

I let it run again last night overnight only to find it back in lockout mode this morning. Don't know what else to try. I am going to get my tanks filled up with propane tonight as I don't know how much is left in them.

Frustrated!

Steve
__________________

__________________
wacnstac is offline   Reply With Quote
Old 04-28-2006, 04:43 PM   #2
Rivet Master
 
1979 31' Excella 500
Detroit Area , Michigan
Join Date: Jul 2004
Posts: 498
Images: 43
Well this time it turns out it may be empty tanks. One was totally empty and one is very near empty. Hopefully this can cause the syptoms I saw as the furnace did run flawlessly one night after I put the new ignitor in. Went to take to tanks to get refilled and even though they have the new valves, they wouldn't refill them because now they have to be RECERTIFIED! If it's not one thing, it's three.
__________________

__________________
wacnstac is offline   Reply With Quote
Old 04-28-2006, 09:36 PM   #3
4 Rivet Member
 
steelbird312's Avatar
 
1956 22' Safari
2000 39' Land Yacht XL Diesel w/slide
Crossville , Tennessee
Join Date: Sep 2003
Posts: 413
Images: 11
One other thing you might check is to make sure your regulator is set for the proper pressure. That will cause refrigerators to not run properly, and I think it is true with the furnace as well. If you have your manual, check to see what it requires. I think it is 11-12 inches of water.
__________________
steelbird312
2000 390 Landyacht XL
1989 29' Excella
WBCCI #6673 jerry Hodge
Have no intention of arriving at the grave safely, but rather to skid in sideways, chocolate in one hand,throttle in the other, totally worn out and screaming
"WOO HOO, WHAT A RIDE!"
steelbird312 is offline   Reply With Quote
Old 05-03-2006, 07:55 AM   #4
Rivet Master
 
1979 31' Excella 500
Detroit Area , Michigan
Join Date: Jul 2004
Posts: 498
Images: 43
Nope, spoke too soon. With two full tanks the thing was still in lockout when I checked it this morning after a night's run. Frustrating to say the least!
__________________
wacnstac is offline   Reply With Quote
Old 05-03-2006, 11:49 AM   #5
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,281
Quote:
Originally Posted by wacnstac
Nope, spoke too soon. With two full tanks the thing was still in lockout when I checked it this morning after a night's run. Frustrating to say the least!
Steve,

The fault could be with your main regulator at the tanks. It should be putting out 11" water guage pressure at 50% draw (a monometer will measure this). Also check the gas valve on the firnace. It might be mis-adjusted or defective .
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is online now   Reply With Quote
Old 05-03-2006, 02:21 PM   #6
Rivet Master
 
Condoluminum's Avatar
 
1988 25' Excella
Sunnyvale , California
Join Date: Jul 2003
Posts: 1,858
Images: 13
Send a message via AIM to Condoluminum
Propane Leak Detector?

Would value Lew's opinion on this as well.. It might be possible there is still small propane leak, or propane leak detector malfunctioning, as it is intended to shut off flow of propane after detecting in the coach, and then resetting itself when problem clears. Does stove continue to work well when furnace shuts down?

John McG
__________________
Condoluminum

In Theory, there's no difference between Theory and Practice, but in Practice, there is usually a difference...
Condoluminum is offline   Reply With Quote
Old 05-03-2006, 02:46 PM   #7
Rivet Master
 
Join Date: Dec 2002
Posts: 1,313
Images: 4
Did you fit a new circuit board? http://www.airforums.com/forum...bug-21981.html
Nick.
__________________
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."
nickcrowhurst is offline   Reply With Quote
Old 05-03-2006, 06:11 PM   #8
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,281
Quote:
Originally Posted by Condoluminum
Would value Lew's opinion on this as well.. It might be possible there is still small propane leak, or propane leak detector malfunctioning, as it is intended to shut off flow of propane after detecting in the coach, and then resetting itself when problem clears. Does stove continue to work well when furnace shuts down?

John McG
A definite possibility and a good way to check out the LP system when the furnace cuts out. If you DO have an igniter board, then it might have a fault in the circuitry that could be causing the problem.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is online now   Reply With Quote
Old 05-03-2006, 08:58 PM   #9
Rivet Master
 
1979 31' Excella 500
Detroit Area , Michigan
Join Date: Jul 2004
Posts: 498
Images: 43
The stove works fine after I find the furnace blowing cold air. I didn't know these things had propane detectors in them though.
__________________
wacnstac is offline   Reply With Quote
Old 05-03-2006, 09:11 PM   #10
Rivet Master
 
Condoluminum's Avatar
 
1988 25' Excella
Sunnyvale , California
Join Date: Jul 2003
Posts: 1,858
Images: 13
Send a message via AIM to Condoluminum
May not have been required in '79, but look for small panel with light and switch near floor and in kitchen area or near furnace or steps. By late 1980's that unit had to be functional and not snifffing propane in order for propane to flow past it into appliances... It is one of two parasitic battery killers if not switched off when you leave unit...

The other is mystic defrost switch on top surface of many Dometic Refrigerators.. Doesn't do much, but will be current drain if left on...

John McG

p.s. Liked the idea of leak testing with hose from inside wheel wells.. Wheel well liners hardly very structural, and water from tires could easily fly past seams. Doesn't seem as likely when trailer parked, however, but could be...
__________________
Condoluminum

In Theory, there's no difference between Theory and Practice, but in Practice, there is usually a difference...
Condoluminum is offline   Reply With Quote
Old 05-04-2006, 07:07 AM   #11
1 Rivet Member
 
Join Date: Nov 2004
Posts: 7
Images: 11
Send a message via AIM to ronmcor
I had exactly the same symptons you do on my 88 Excella. Turns out the previous owner had the wrong ignitor in the furnace. It was too short and did not always re-light the furnace. Long shot maybe, but it did happen to me.
__________________
ronmcor is offline   Reply With Quote
Old 05-04-2006, 07:48 AM   #12
VAC President
 
Buttercup's Avatar
 
1977 27' Overlander
1954 25' Cruiser
1990 34.5' Airstream 345
VC Highlands , Nevada
Join Date: Mar 2005
Posts: 2,149
Send a message via Skype™ to Buttercup
Quote:
Originally Posted by wacnstac
The stove works fine after I find the furnace blowing cold air. I didn't know these things had propane detectors in them though.
Question: How are you resetting the furnace after it "locks out"? I am finding this to be a curious problem myself...
__________________
Buttercup's Web Site. WBCCI #17330, 11281 & 7830. VAC Past President, TAC NV-2 & NV-3
Buttercup is offline   Reply With Quote
Old 05-04-2006, 08:07 AM   #13
Rivet Master
 
1979 31' Excella 500
Detroit Area , Michigan
Join Date: Jul 2004
Posts: 498
Images: 43
The ignitor is a brand new one and an exact replacement for this furnace (after 2 wrong ones). I reset the furnace after lockout by simply turning the thermostat to off and then back on. As for the wheel well leak, I am not spraying a hose there. The water is coming from somewhere else and you can see the moisture along the C channel at the front of the wheel well and no, the trailer was not being towed in the rain.

Steve
__________________
wacnstac is offline   Reply With Quote
Old 05-04-2006, 10:36 PM   #14
Rivet Master
 
1979 31' Excella 500
Detroit Area , Michigan
Join Date: Jul 2004
Posts: 498
Images: 43
Another symtom I have noticed and am not sure if it is significant is that occasionally after the thermostat is satisfied and the blower shuts off, the blower will then cycle on and off several times. I assume this is because something is still detecting heat in the chamber which needs to be blown out but maybe it is a sign of something more serious. Would this be a problem with the main board, or is there another switch involved?
__________________

__________________
wacnstac 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
310 door lock parts joepospisil General Motorhome Topics 8 10-02-2012 12:14 PM
Entry Door Lock Set Hunt ends at Inland Grady White 1959 - 1965 Ambassador 3 12-16-2004 10:08 PM
Jingle Bell Furnace Fix Pahaska Furnaces, Heaters, Fireplaces & Air Conditioning 5 11-19-2002 10:59 PM
Forced Air furnace Joan D'Andrea Furnaces, Heaters, Fireplaces & Air Conditioning 16 11-02-2002 10:41 PM
Door Lock replacement? 3Ms75Argosy Doors & Locks 2 08-16-2002 12:12 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:01 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.