Hi, the model and serial are: GSS20IEPJWW DH261848. As I recall I just plugged in the motherboard, didn't jump any wires. I didn't think the instructions called for it on that serial #. But the heaters that gone bad are not blackened, but they are malformed and broken with no continuity. After all these heaters I thought maybe I was just supposed to use both sides of the coil instead of just one. I've been using just one, not re-routing the pink and blue wires. Also I cut into the heaters wiring harness to install new thermistor and defrost thermostat. Is it true that water getting in that harness can blow the board?