I had the recall for the heat sensor done in 2011 to my Norcold 1200LRIM . Since then I have had cooling issues in hot climates as many have. Not at the time being that familiar with my fridge, I did not know I could hear the fans run from inside the coach. I have read posts here and on other blogs that people have had their fans wired backwards when they received their coach. I was since I cannot see the wires coming from the fans, I looked at the wiring diagrams to see if I could figure it our. Are the fans wired along with the flapper heater wires into the board. The flapper heater works fine. I am trying to decide whether to install additional fans up at the condenser but wanted to see if I can figure out if the muffin fans will work before I do this. Can anyone tell me whether these 2 are wired together and if they are what color wire should be the ground? I am not going to just swap the flapper heater wires to see if that will make the fans run.

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Flapper heater and fans use same 12V DC (+) and 12V DC (-)........Positive should be White or RedNegative should be BlackT-stat for fans should close (ON) at 130*F and open (OFF) at 115*F (condenser fin temp)

Super!! Thanks for the response! Guess I have a fan/thermostat problem then since the wiring looks good, so it's yank the fridge to replace the equipment or add new fans ... the later would be cheaper and take less time (wait time and hourly rate), and probably more efficient .... Thanks again for confirming for me .... I've been using small AC fans when docked and shaded the fridge with a mesh tarp, but the road was a problem unless I wanted to use the inverter but I didn't have the shade .... that made temps rise to upper 40's .... hoping some switched DC fans will do the trick ....

mperkins52 wrote:Super!! Thanks for the response! Guess I have a fan/thermostat problem then since the wiring looks good, so it's yank the fridge to replace the equipment or add new fans ... the later would be cheaper and take less time (wait time and hourly rate), and probably more efficient .... Thanks again for confirming for me .... I've been using small AC fans when docked and shaded the fridge with a mesh tarp, but the road was a problem unless I wanted to use the inverter but I didn't have the shade .... that made temps rise to upper 40's .... hoping some switched DC fans will do the trick ....Disconnect OEM fans from t-stat.......install an ON/OFF switch in + line to fans. Turn them ON and let them run.

IF on a recall install they remove the rear black module board to install the recall kit wires, IF they reverse the White and Black fan/flapper wires, the rear fans will NOT work. If the outside temp is over 70 degrees and the refer has been running at least 12 hours, just reverse those 2 wires (They have a large white an small white wire together, and a large black and small black together). If the fans come on in a few seconds they reversed those wires, so leave them in the new position. This is a common complaint/problem when someone removes the black module board cover. They do not know which wires go where and since nothing bad happens when they misconnect, they figure they connect correctly. Staring at the back of the module board, the White wires will be to the left and the Black wires to the right of the white. There is no other way to diag the fans without pulling the refer, unless the refer is in a slide room with a upper access door. Doug

Norcold 1200 Muffin Fans | Good Sam Community

16 Replies

mperkins52
Explorer
Jul 10, 2014
Will the flapper heater still work with the wires reversed from their present position? I assume they will since the reversed position should be the correct position ... Is that a good assumption?
dougrainer
Nomad
Jul 08, 2014
IF on a recall install they remove the rear black module board to install the recall kit wires, IF they reverse the White and Black fan/flapper wires, the rear fans will NOT work. If the outside temp is over 70 degrees and the refer has been running at least 12 hours, just reverse those 2 wires (They have a large white an small white wire together, and a large black and small black together). If the fans come on in a few seconds they reversed those wires, so leave them in the new position. This is a common complaint/problem when someone removes the black module board cover. They do not know which wires go where and since nothing bad happens when they misconnect, they figure they connect correctly. Staring at the back of the module board, the White wires will be to the left and the Black wires to the right of the white. There is no other way to diag the fans without pulling the refer, unless the refer is in a slide room with a upper access door. Doug
Old-Biscuit
Explorer III
Jul 08, 2014
mperkins52 wrote:
Super!! Thanks for the response! Guess I have a fan/thermostat problem then since the wiring looks good, so it's yank the fridge to replace the equipment or add new fans ... the later would be cheaper and take less time (wait time and hourly rate), and probably more efficient .... Thanks again for confirming for me .... I've been using small AC fans when docked and shaded the fridge with a mesh tarp, but the road was a problem unless I wanted to use the inverter but I didn't have the shade .... that made temps rise to upper 40's .... hoping some switched DC fans will do the trick ....

Disconnect OEM fans from t-stat.......install an ON/OFF switch in + line to fans. Turn them ON and let them run.
mperkins52
Explorer
Jul 08, 2014
Super!! Thanks for the response! Guess I have a fan/thermostat problem then since the wiring looks good, so it's yank the fridge to replace the equipment or add new fans ... the later would be cheaper and take less time (wait time and hourly rate), and probably more efficient .... Thanks again for confirming for me .... I've been using small AC fans when docked and shaded the fridge with a mesh tarp, but the road was a problem unless I wanted to use the inverter but I didn't have the shade .... that made temps rise to upper 40's .... hoping some switched DC fans will do the trick ....
Old-Biscuit
Explorer III
Jul 08, 2014
Flapper heater and fans use same 12V DC (+) and 12V DC (-)........

Positive should be White or Red
Negative should be Black

T-stat for fans should close (ON) at 130*F and open (OFF) at 115*F (condenser fin temp)
1492
Moderator
Jul 08, 2014
Moved from Forum Technical Support

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Norcold 1200 Muffin Fans

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