OK... thanks for the testing data. It does sound like the control board might have an issue similar to the other link I posted. The control board has a couple of different relays, one could be an issue or as the previous poster indicated, the physical position of the board in the box is such that it is touching something that it shouldn't be (inspect carefully). The two screws on the plate expose the innards of the box which then will get you the number. Remember to turn off the breaker before playing with the box!
