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RV-Dreams.com Home -> RV-Dreams Community Forum -> RV Maintenance and Technical Tips -> furnace failed AGAIN
Post Info TOPIC: furnace failed AGAIN
Cindy T


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furnace failed AGAIN
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It's 4:30am, outside temperature is minus 5 & the furnace has failed again. Down to 57 degrees in the RV. We have space heaters going but can't get it any warmer.
We've been in this 2008 MS for 3 years & every winter the furnace stops working. Every time it fails, we replace the mother board & it starts working again.
The furnace failed 1 month ago, so bought another new mother board. The furnace worked for a month. And now it's failed again.
Before we freeze to death, does anyone have any ideas as to what the problem really is with this furnace? Having the board continually fail can't be normal.
I appreciate your thoughts about this.

Cindy
2008 MS 38RLSB3



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Cindy T

08 Mobile Suites 38RLSB3
Lucky Mike


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Clean all the contacts on the mother board....pay special attention to the white or black slip on Molly connections....a can of contact cleaner (available at auto parts or radio shack) will help with the connectors and a pencil eraser to clean the board contacts

dont forget to check your thermostat......you can jump the 2 wires going to the heater(this can be done at the heater)



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 1998 ...Harney Renegade DP  class A

rers1@mail.com

 

My Service dog and life partner " Nikki"......Klee Kia Miniature Husky....(she Runs the ship!!)

We are not lost in the Woods.....Just Extreme boondocking!!!!!!
01zeosix


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Might not be the motherboard. Might be the regulator. Just sayin'.

Hope this helps. Had the same thing with mine. New regulator fixed the issue.



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01zeosix
'08 DRV MS 36RSSB3 (#4049)
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el Rojo and Pam


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Sounds like a short somewhere. Look for bare or stripped wires going around bends or turns during the installation process. Do this at the thermostat also. Follow Mike's instructions too, might just not be making contact.

Hope this helps.

Red

Do you still have an old mother board? If so re-install it. If it works than Mike's instructions will probably solve your problem.

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53 Merc


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Mine did the same thing. Removed all the splice connectors (the ones that you crimp one wire to another one and it is supposed to make a connection), got some shrink wra and the trusty soldering iron, soldered all connections and shrink wrapped all conections. Used contact cleaner on everything else, never a problem since, other than consuming propane like there is an unending supply.

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Workinrvers


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definitely check those crimp connections. Suburban had a reputation for not getting those things tight back when we owned our 07 Montana. Too many furnaces (mine included) on the Montana Owners Forum were "fixed" by correcting this issue.

Phil

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Cindy T


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Thank you all for your suggestions.  My husband did check everything & found a loose connection.  Tightened it, hoping that the furnace would work, but it didn't.  So we purchased another mother board, installed it, made sure all conections were tight & the furnace is working again.



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Cindy T

08 Mobile Suites 38RLSB3
el Rojo and Pam


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Glad you have heat again!!!!!!

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Full timing since 2/27/14.

Silverado HD 3500 4X4 Dually.

Momentum 380 by Grand Design.
Cindy T


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Me too, el Rojo!  I'm glad that I don't have to wear my winter coat & gloves INSIDE the RV!!



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Cindy T

08 Mobile Suites 38RLSB3
Lucky Mike


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For future reference Cindy......dont throw away the old board , there is a rebuilder that will fix the board for alot less than buying a new one. have it rebuilt and put it away for future problems.

I will post the Contact info on here as soon as I pull it out of my file cabinet ....(you think I would have put it on the computer!!)

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 1998 ...Harney Renegade DP  class A

rers1@mail.com

 

My Service dog and life partner " Nikki"......Klee Kia Miniature Husky....(she Runs the ship!!)

We are not lost in the Woods.....Just Extreme boondocking!!!!!!
Cindy T


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Sounds like that will be very useful info to have, Lucky Mike!



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Cindy T

08 Mobile Suites 38RLSB3
Lucky Mike


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I have used these guys for replacements and rebuilds......there site is very helpful for wiring schematics and trouble shooting...

there warranty is good and I have returned a couple over the years and had no problem with them standing behind there work and they are fast about getting it done!!

www.dinosaurelectronics.com

They are located in oregon

I am unsure whether they handle direct to customer or if you must go thru an authorized dealer but if that is the case contact me and I can help you there



-- Edited by Lucky Mike on Sunday 8th of December 2013 09:11:58 AM

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 1998 ...Harney Renegade DP  class A

rers1@mail.com

 

My Service dog and life partner " Nikki"......Klee Kia Miniature Husky....(she Runs the ship!!)

We are not lost in the Woods.....Just Extreme boondocking!!!!!!
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