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01-27-2008, 10:06 AM
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#1
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Member
Join Date: Jan 2008
Posts: 30
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My First Mod to 831KRSS
My first modification to our new Flagstaff 831KRSS was installing the Hunter digital thermostat (Model 4299B). I followed these great instructions I found on google. I could not find the author name, but wanted to give him credit. The entire project took about 1 hour with some minor soldering required. Cost of project was about 30-35 bucks depending on what stuff you have lying around.
This mod works great... it keeps the temperature within 1 degree of where it is set. You will notice the addition of a rocker switch under the thermostat, this allows for a low/high fan speed, instead of just having auto and on for the fan. Most homes don't have low and high on the AC fan like RV's, so not wanting to give up this option, I installed the extra switch.
If anyone has questions on this please email me anytime. Frank
The photos show:
1. Old Duotherm thermostat
2. Backplate of old thermostat
3. New backplate with red wire cut and sealed off (not used on Hunter) also shows spade connection I used to hook up new multi-speed fan switch.
4. finished project! Yes it was 47 degrees when I was doing this!
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01-27-2008, 03:01 PM
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#2
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Member
Join Date: Aug 2006
Location: Pleasureville, Ky. Small farm 15.5 acres
Posts: 93
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Great Mod!! That's my next project!! Thanks!!
__________________
2000 F-150 4x4 sc,off road pkg,Tow Pkg,5.4,3.73TL,2007 Flagstaff 8524RLS,and One Happy Maltese! See You Down The Road!!!
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01-27-2008, 04:23 PM
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#3
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Senior Member
Join Date: Aug 2006
Location: homebase Quitman Texas at Lake Fork
Posts: 1,399
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Ok i have seen a few guinea pigs do it so now i have to jump in and get one.
thanks for the pics and write up
__________________
Living in the Piney Woods of Texas.
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01-28-2008, 11:02 PM
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#4
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The Jolly Mon
Join Date: Jul 2007
Location: ND...HELP!
Posts: 1,691
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Quote:
Originally Posted by powerboatr
Ok i have seen a few guinea pigs do it so now i have to jump in and get one.
thanks for the pics and write up
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Who you calling a pig! 
Great mod. I love our digital thermostat upgrade as well.
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Pete (Jolly Mon)
2018 Wildwood Grand Lodge 42 DLTS
-Seasonal Space, Northern MN.
-2017 Sylvan 8522 LZ LES/115 Merc/Sea Legs
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02-10-2008, 09:11 PM
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#5
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Senior Member
Join Date: Aug 2006
Location: homebase Quitman Texas at Lake Fork
Posts: 1,399
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yeaaa haw put mine today
Wow it was pretty easy and thanks to all the good directions
I did put my "high fan" switch ove ron the other switch area, i dont use high fan much so it got relocated, just need to make a label and we be done
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Living in the Piney Woods of Texas.
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02-15-2008, 07:37 PM
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#6
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Member
Join Date: Jan 2008
Posts: 30
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where did you put the fan switch? I am not clear on that.
Frank
__________________
2005 Dodge Ram Quad Cab 4x4 (5.7L Hemi)
2008 Flagstaff 831 KRSS
2000 Son
2002 Daughter
1969 Wife
1974 Me
Live and Work in St. Louis, MO. area, but play everywhere! 
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02-17-2008, 03:38 PM
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#7
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Senior Member
Join Date: Aug 2006
Location: homebase Quitman Texas at Lake Fork
Posts: 1,399
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Quote:
Originally Posted by fire4034
where did you put the fan switch? I am not clear on that.
Frank
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sorry
i moved it behind the message board center that hides the switches for the slides and stuff
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03-08-2008, 11:28 AM
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#8
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Senior Member
Join Date: Aug 2006
Location: homebase Quitman Texas at Lake Fork
Posts: 1,399
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hmmmm
last night it got down to 22 and was pretty darn cold
we woke up about 430 am freezing, both dogs were shivering
seems my batteries died in the thermostat and we had no heat
i laughed but all that came out was ice cubes as i put in new batteries, i geuss the ones i put in to start with were going south last month 
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Living in the Piney Woods of Texas.
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03-11-2008, 05:29 AM
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#9
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Senior Member
Join Date: Aug 2007
Location: Lakeview Oregon
Posts: 134
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we just did the same upgrade with the same thermostat. it works great !!! thanks for the pics and info.
I called the local RV techy and he told me that I couldnt use the hunter thermo in an RV and had to go buy a Dometic doal control termostat specifically for the RV ,at $90-120 special order. I came back here and found some info along with the pics, and another site on installing the hunter thermostat in the RV.
it works great, the furnace isnt cycling on and off every hour, and our propane usage dropped significantly. I havent installed the HI fan switch yet, due to snow on the ground and still cold at night. its only hitting 35 during the day..
Thanks again!!! 
__________________
YT
2007 Dodge 2500 QC 4x4 LB CTD
2004 Forest River Salem 39FBRB
2005 Kawasaki 700 4x4 ATV
2002 Kawasaki 300 4x4 ATV
2008 Chinese 110CC kids atv
4 Great Kids......
and a wonderful wife of 12 yrs now.....
Could not ask for more 
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03-19-2009, 01:53 PM
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#10
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Member
Join Date: Mar 2009
Location: Yucca Valley, Ca.
Posts: 31
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Fire4034 or powerboatr,
I'm installing my Hunter Thermostat today. Great idea. I'm confused on the Hi Speed switch connection. I bought a SPST micromini switch to install on the bottom of the thermostat and I see the blue wire will connect to that. Where does the return wire connect back to the thermostat?
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03-19-2009, 01:57 PM
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#11
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Member
Join Date: Mar 2009
Location: Yucca Valley, Ca.
Posts: 31
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Never mind.. I missed the link that Fire4034 had in his post to show the connection.
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03-19-2009, 03:46 PM
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#12
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Member
Join Date: Mar 2009
Location: Yucca Valley, Ca.
Posts: 31
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It's in. That was a simple modification and it only took me about 20 minutes to do. It works great, no problems. I installed a flush mount SPST rocker switch on the wall instead of a switch on the bottom of the faceplate. All the wiring is behind the wall and I can take the face plate off without disconnecting a wire. Rock the switch up for high speed and down for low speed. Thanks everyone for all the info.
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03-20-2009, 07:23 AM
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#13
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Site Team
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 9,850
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Well dangit, now see what you've all done! I've been putting this off for longer than I should have. Now the DW has seen the photos and read how easy it is, so guess what I'll be doing this weekend while camping???  Oh well I should have done it a long time ago.
__________________
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin! 
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03-20-2009, 08:03 AM
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#14
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Senior Member
Join Date: Sep 2007
Posts: 3,260
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Question, what is sensing the temperature, I don't see a thermistter on the sub base?
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03-20-2009, 11:13 PM
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#15
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Member
Join Date: Mar 2009
Location: Yucca Valley, Ca.
Posts: 31
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The sensor is located in the face plate, which houses all the electronics.
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06-19-2010, 03:17 PM
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#16
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Junior Member
Join Date: May 2009
Posts: 23
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I did the mod today on my 2501ss and it works great. Thanks for the how-to information.
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The Wilson's
Linear Mode
