I have a frigidaire slide in electric range, smooth top, convection oven. When I attempt to turn on the oven, self clean feature i receive an F30 err message. I cannot get the clock to set , the warmer drawer to come on. However the max clean will start. Very interesting. when this all occurred i was using two 22 quart pressure canners on the top two large burners, which by the way the burners are working fine. ????