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Mod 3663 dometic 3 way ref Mike Arno 3-9-13  
Ref works on 12volt and gas modes but trips the groundfault on 120 volt after 15 to 20 has a replacement dynasaur board(already installed before I bought the coach)
I did replace the gfci.what would cause this
thanks mike
Re: mod 3663 dometic 3 way ref Keith 3-10-13  
Hi Mike, most likely the 120V heating element is shorted out. It's on the side of the flue just about a foot above the flame box. If you unplug both wires from the circuit board (with fridge unplugged) it should have 44 ohms of resistance + or - 10%. Good luck
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