My GE dishwasher has started being temperamental. When I push the start button and close the door it goes into sensing mode for 60 seconds then goes straight to heated drying mode with the start button flashing. This continues for about 80 seconds then it turns off. If I repeat the starting process, eventually it will go from sensing to the wash cycle. This can take 4-6 tries to get it going. After it starts properly, it washes just fine. I thought it might be the control panel but I think it might be detecting something during the sensing phase. Any ideas?