Dinosaur Electronics Replacement 3850712.01Dinosaur Electronics 3850712. 01 Replacement * Use the 3850712. 01 to replace Dometic's 3850712 xxx Black Box Board Built in Ignitor. 2 way or 3 way operation. Fuse protected. Variable Temperature adjustment for those FIXED TEMP refrigerators. The CHECK light comes on after each ignition to sense a flame. Repeats the 3 try ignition cycle at 30 minute intervals if no flame is sensed. * In 3 way models, the DC element will drop out and the DC mode light