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Old 01-27-2008, 10:06 AM   #1
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Talking 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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Old 01-27-2008, 03:01 PM   #2
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Great Mod!! That's my next project!! Thanks!!
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Old 01-27-2008, 04:23 PM   #3
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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
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Old 01-28-2008, 11:02 PM   #4
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Quote:
Originally Posted by powerboatr View Post
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

Who you calling a pig!

Great mod. I love our digital thermostat upgrade as well.
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Old 02-10-2008, 09:11 PM   #5
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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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Old 02-15-2008, 07:37 PM   #6
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where did you put the fan switch? I am not clear on that.

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Old 02-17-2008, 03:38 PM   #7
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where did you put the fan switch? I am not clear on that.

Frank
sorry
i moved it behind the message board center that hides the switches for the slides and stuff
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Old 03-08-2008, 11:28 AM   #8
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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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Old 03-11-2008, 06:29 AM   #9
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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!!!
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Old 03-19-2009, 02:53 PM   #10
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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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