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scolew325's avatar
scolew325
Explorer
Dec 20, 2013

atwood 7920-II furnace wiring question

In order to make repairs on my camper I had to pull the furnace out. I wired it back up according to my notes butwouldnt turn on. I called a local shop and he told me to wire it up differently. When returning the fuse it sparked unordinarily. I still cant get it to turn on. Could I have burned the board out or is it still wired wrong.
black and white wires from camper. Red white and black from furnace, red and white from thermostat.
My notes shown: camper white to black furnace
camper black to furnace and thermostat red
thermostat white to furnacewhite
Is this correct?
Truck Campers
  • 3_tons's avatar
    3_tons
    Explorer III
    Dec 20, 2013
    Check out this Atwood Instruction Link for your model furnace.

    http://www.atwoodmobile.com/manuals/furnaces/MPD%2032072%20SP%201.08.pdf

    3 tons
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Dec 20, 2013
    Camper black & white wires
    Check which color is 12V (+) probably white & black is ground

    Thermostat red & white
    Red is 12V (+) going to t-stat
    White is 12V (+) from t-stat to limit switch/sail switch to circuit board

    Furnace red, white & black
    Red is 12V (+) going to fan motor(ties in with red going to t-stat....small circuit breaker on furnace casing)
    White is 12V (+) going to limit switch/sail switch to circuit board (ties in with white from t-stat)
    Black is GROUND
  • scolew325's avatar
    scolew325
    Explorer
    Dec 26, 2013
    Since everyone besides myself is sick in my house I went to the TC and discovered what the problem is, the little tiney get your readers out size wire that is on the thermostat got fried. that's a cheap fix comparing the alternative.

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