We have the above Microwave/convection oven on a 15amp breaker in our 2005 Winnebago Class A motorhome and have used it in the past with no problems. This last weekend, we encountered the following problem for the first time. Whether using the unit in micro or convection mode and setting the timer for over 1 minute, the unit shuts off at 59 seconds and after repressing the start button, it will continue. (Example): 1. Timer set for 3 minutes; unit runs for 59 seconds and shuts off; press start button and runs for 59 seconds and shuts off. This will occur until timer minutes on used. BTW, it's not tripping the 15amp breaker, which is shared with the fridge when this occurs. I've even run the fridge on LP and tried it on the gennie with the same results. Our Enery Management System shows the unit (850Watts) to be pulling 14-17 amps (this seems rather high to me) when running with everything else in the motorhome shutdown. Our volt meter showed incoming volts between 117-120. Anyone have any ideas?