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
Lucky Mike said
08:04 AM Dec 7, 2013
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)
01zeosix said
08:34 AM Dec 7, 2013
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.
el Rojo and Pam said
08:36 AM Dec 7, 2013
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.
53 Merc said
10:39 AM Dec 7, 2013
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.
Workinrvers said
02:38 PM Dec 7, 2013
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
Cindy T said
06:19 AM Dec 8, 2013
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.
el Rojo and Pam said
06:58 AM Dec 8, 2013
Glad you have heat again!!!!!!
Cindy T said
07:02 AM Dec 8, 2013
Me too, el Rojo! I'm glad that I don't have to wear my winter coat & gloves INSIDE the RV!!
Lucky Mike said
08:06 AM Dec 8, 2013
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!!)
Cindy T said
08:31 AM Dec 8, 2013
Sounds like that will be very useful info to have, Lucky Mike!
Lucky Mike said
09:08 AM Dec 8, 2013
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!!
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
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
dont forget to check your thermostat......you can jump the 2 wires going to the heater(this can be done at the heater)
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.
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.
Phil
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.
Me too, el Rojo! I'm glad that I don't have to wear my winter coat & gloves INSIDE the RV!!
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!!)
Sounds like that will be very useful info to have, Lucky Mike!
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