Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 02-05-2007, 03:16 AM   #1
Senior Member
 
Freightliner Owners Club
Join Date: Nov 2006
Location: Virginia Beach, Va
Posts: 122
I am having a problem with my Suburban Gas Furnace model SH-42. I have a 2004 Itasca Meridian 39K. It started 2 weeks ago. The furnace fan comes on but the furnace will not light. It doesn't happen all of the time and can be above or below freezing. If you shut it off and then back on a few times it will finally fire up and you will getwarm air. The biggest problem is that you can have warm air during the night and then it will not light and the system shuts down. Any suggestions?
__________________

__________________
Mike and Pat Montgomery
3 cats, 1 Dog,1 Bird - 2004 Itasca Meridian 39k
2009 Saturn Outlook (Toad)
Mike and Pat is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 02-05-2007, 03:16 AM   #2
Senior Member
 
Freightliner Owners Club
Join Date: Nov 2006
Location: Virginia Beach, Va
Posts: 122
I am having a problem with my Suburban Gas Furnace model SH-42. I have a 2004 Itasca Meridian 39K. It started 2 weeks ago. The furnace fan comes on but the furnace will not light. It doesn't happen all of the time and can be above or below freezing. If you shut it off and then back on a few times it will finally fire up and you will getwarm air. The biggest problem is that you can have warm air during the night and then it will not light and the system shuts down. Any suggestions?
__________________

__________________
Mike and Pat Montgomery
3 cats, 1 Dog,1 Bird - 2004 Itasca Meridian 39k
2009 Saturn Outlook (Toad)
Mike and Pat is offline   Reply With Quote
Old 02-05-2007, 05:57 AM   #3
paz
Senior Member
 
paz's Avatar
 
Join Date: May 2005
Location: Full-timers - Home is where we park it.
Posts: 4,716
Mike - Welcome to irv2.

There are a number of things that could cause the problem you describe. The first thing is to make sure nothing is blocking the cold air intake inside or the exhaust vent outside. Does your Meridian furnace use the air filter under the bed? I don't know if it does of if that filter is just for the air conditioner. If the furnace draws air through the filter, make sure the filter is clean and that nothing has shifted to block it. Wasps and spiders sometimes clog the outside vent. I also assume you are plugged in and low voltage is not a problem.

If the intake and exhaust are clear, I think the next most likely cause would be the sail switch. This switch checks for adequate exhaust flow before allowing the gas to come on. If the switch is hanging up or faulty, there will be no heat.
__________________
2015 DRV Tradition 375KPS
2015 Chevy Duramax 3500HD LTZ Dually
Full-timers...Home is where we park it.
Check out our blog: Living Our Dream
paz is offline   Reply With Quote
Old 02-05-2007, 10:16 AM   #4
Community Moderator
 
"007"'s Avatar


 
Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 26,792
Welcome Mike Montgomery to irv2.
Check as "paz" said also you could be having problem with gas regulator on tank freezing up, all valves open fully. Some others will chime in here so enjoy the forums and post often.
__________________
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans, now in good hands
VISIT the NEWMAR QUICK TIPS & EASYMODS 1 & 2
QUICK TIPS # 3
RV SYSTEMS & APPLIANCES & RECALLS --- TECH INFORMATION
"007" is offline   Reply With Quote
Old 02-05-2007, 06:15 PM   #5
Senior Member
 
Retired and Happy's Avatar
 
Join Date: Feb 2004
Location: Stone Mountain, GA
Posts: 941
Is your fan motor running up to speed? If it's slow, either from corrosion, dry shaft, or low voltage, the sail switch will not sail and the heat cycle of the furnace won't start. (Spoken from current experience on a similar heater.) On mine, the same dual ended motor runs the two fans for inside heat distribution and exhaust. In my case a new sail switch did not improve things. When the weather gets warm enough that I won't need the furnace, I'll work on the motor.
__________________
Ken, Judy, and the Angels--2005 Fleetwood Southwind--2008 Cargo Trailer--2003 EZGO Golf Cart
Retired and Happy is offline   Reply With Quote
Old 02-06-2007, 12:54 AM   #6
Community Moderator
 
RV Wizard's Avatar


 
Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
Mike & Pat, welcome to iRV2.com. We are glad to have you join us here and look forward to reading of your adventures and experiences. Sorry to heart of the trouble you are having with the furnace. THe #1 problem with these are pest building nest in the combustion chamber, burner, ignitor area. The #2 is the connection to the ignition board. I would suggest you clean the contacts at the board first since it is the easiest to get to. If that fixes it, good. If not then clean the burner area and make sure the spark gap is set to about 3/16" from Burner and the burner is clean. Goo luck and let us know how you do.
__________________
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 02-06-2007, 08:31 AM   #7
Senior Member
 
Freightliner Owners Club
Join Date: Nov 2006
Location: Virginia Beach, Va
Posts: 122
Thanks everyone for their suggestions. I have started to go through all of the common areas and everything looks good. I found the intake it is under my dresser. I took out the drawers and looked and did not see any blockage. It stoped again last night just as the temperature was dropping to 20 degrees. At 3am I found this out and stayed up for 45 minutes trying to make it recycle. it finally started producing heat and i went back to bed. It only got to 66 inside so not bad. This morning I removed the drawer again and stuck my hand down into the hole for the intake and found a small box (4" x10") i removed it and the heater started up. I will wait until it get cold again tonight and see if it stays working.
__________________
Mike and Pat Montgomery
3 cats, 1 Dog,1 Bird - 2004 Itasca Meridian 39k
2009 Saturn Outlook (Toad)
Mike and Pat is offline   Reply With Quote
Old 02-06-2007, 10:07 AM   #8
Senior Member
 
troth's Avatar
 
Join Date: Aug 2003
Location: NE Ohio
Posts: 1,177
OK, Mike and Pat, I'll bite!!! -What was in the box you found?
__________________
Last Brave 2004 34D
troth is offline   Reply With Quote
Old 02-07-2007, 05:59 AM   #9
Senior Member
 
Winnebago Owners Club
Join Date: Dec 2003
Location: MN,USA
Posts: 651
If removing the mystery box doesn't cure your problem I suggest you have a bad circuit board. I base that on our experience as we had problems with our furnace last year. two dealers worked on it and it did not show problems when it was "on the bench" After re-instalation the furnace failed. New circuit board was installed at the second dealer and the problem has gone away. I suspect that the hheat in the enclosure for the furnacee was caausing the printed circuit to open.

Hope you havee heat.
__________________
2004 Itasca Sunrise 36', Workhorse
2003 Suzuki XL7
Dsouthw524 is offline   Reply With Quote
Old 02-08-2007, 03:01 AM   #10
Senior Member
 
Freightliner Owners Club
Join Date: Nov 2006
Location: Virginia Beach, Va
Posts: 122
Well, removing the box has seemed to have fixed the problem. It has run now for about 36 hours with no problems.

What was in the box? A HEPA filter for an air cleaner.
__________________
Mike and Pat Montgomery
3 cats, 1 Dog,1 Bird - 2004 Itasca Meridian 39k
2009 Saturn Outlook (Toad)
Mike and Pat is offline   Reply With Quote
Old 02-08-2007, 03:16 AM   #11
Senior Member
 
Retired and Happy's Avatar
 
Join Date: Feb 2004
Location: Stone Mountain, GA
Posts: 941
I hope your problem is solved and you have no further furnace problems. I guess we can conclude a filter in a system is not always good, even if it is a HEPA filter.
__________________

__________________
Ken, Judy, and the Angels--2005 Fleetwood Southwind--2008 Cargo Trailer--2003 EZGO Golf Cart
Retired and Happy 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
Heat Pump and Gas Furnace dengraham Winnebago Industries Owner's Forum 10 02-28-2009 02:55 PM
Propane furnace vs. heat pump operating costs John_Canfield Winnebago Industries Owner's Forum 12 01-03-2008 05:44 AM
Furnace heat is intermittant MaxAZ 5th Wheel Discussion 6 12-01-2007 05:14 AM
Carrier A/C-Heat Pump-furnace Dualy Driver 5th Wheel Discussion 5 02-12-2005 04:21 AM
Lp Furnace problem (intermitent heat) New Member Check-In 10 12-31-1969 07:00 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:41 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.