My 3 month old hybrid water heater quit working. Rather than the LCD error codes I've seen discussed on this and other forums, my LCD screen is blank, and the "High Demand" and "Stop Cold Air" lights are blinking. I've pressed each button, I've held each button for 5 seconds, I've reset the breaker, and nothing changes anything. The unit has been working fine in hybrid mode, although it seemed to run almost continuously. Any suggestions would be appreciated, it's Saturday morning and the GE service center is closed on weekends.