I discovered the GFI was tripping because one of the water hoses on one the heater ports was leaking. Water was dripping onto the lower end of the brew group motor and the on the wires and electronics at the bottom of the machine. Once the machine dried out and I reset the GFI outlet the machine would run until the water leaked enough to cause a current leak. It was not shorting enough to blow my circuit breaker but just enough to trip the GFI outlet. I hope that helps someone else with a similar problem.