Thread Tools Display Modes
Old 11-13-2015, 06:51 AM   #11
Site Team
KyDan's Avatar
Join Date: Mar 2008
Location: Louisville, KY
Posts: 5,636
Please post the make and model # of your furnace.
It very likely does NOT have a thermocouple.
It probably has a flame sensor which is not the same.
Modern LP furnaces and water heaters and even LP refrigerators have
flame sensing technology which does not use a thermocouple.

IF it's lighting only sporadically and then not staying lit once it does light the
control board is suspect. You can try polishing the spark electrode with
extra fine sandpaper and make sure any push on connectors going to/from
the board are tight (pull them off and replace them a few times to help make
sure they are not corroded at the plug).

Dinosaur boards are highly regarded as better than new and usually a bit
cheaper than original. I had to put one in my last rig after my furnace exhibited
pretty much the same symptoms you say you are having.

Dan & Rita D
2004 5.3L Silverado 1500 ext. cab 2WD
1999 Suzuki Intruder Motorcycle
Blue Ox WD hitch, AirLift load levelers

Camping days 2010-53, 2011-47, 2012-41,
2013-41, 2014-31, 2015-40, 2016-38
KyDan is online now   Reply With Quote
Old 11-13-2015, 09:38 AM   #12
Join Date: Sep 2012
Location: CA
Posts: 342
Yep going to need a model# and then a wire diagram and/or schematic.
I never leave home with out them, for each major appliance. I hope not to need them but they sure are a life saver when you do need them.
Doing some thinking and it could be a bad or sticky solenoid too.
Its hard to diagnose stuff from a distance but its just a puzzle one piece at a time tell one is missing/bad.
Good Luck

2011 Wildwood T26BHXL
2004 Yukon XL Denali
43yrs of camping; one lucky guy
YoungKopernik is offline   Reply With Quote
Old 11-13-2015, 09:55 AM   #13
Senior Member
northstar1960's Avatar
Join Date: Feb 2015
Location: in my new 29hfsxlr
Posts: 1,417
Originally Posted by dandr614 View Post
Is there a generic part number for this suburban thermocouple?
x2 on the flame sensor . but do not polish, a very slight cleaning will do . one does not want to take sand paper to it and polish it so much as a very lite and simple clean a couple stroke will do . the sensors will get carboned up and not sense flame and causes what you are experiencing
northstar1960 is offline   Reply With Quote
Old 11-13-2015, 02:37 PM   #14
Junior Member
Join Date: Oct 2015
Posts: 14
Thanks all I will pull the control board as soon as I return. Luckily it has not gotten real cold yet and my ceramic heater seems to be working well enough for the time being.

Rich Wallen
2012 31' Flagstaff Classic BH
dandr614 is offline   Reply With Quote


Thread Tools
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

» Virginia Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 04:51 PM.