Magic Chef Gas Range 6498VRA Timer Repair

My washer's grey water discharge is dispensing quicker than the drain can drain it. I flushed the line with a high pressure hose, freeing the line of any debris. The water drained without backup or delay for several minutes. I reconnected the washer and upon dispensing the grey water, the drain pipe fills quickly and grey water comes out of the draiin pipe. I cant seem to figure what to do next?? Please help my home is suffering.

Model 629.46979, stand-alone oven/cooktop with center fan. Oven stopped heating. Both elements check at 20 Ohms. No voltage to elements. When I set on Bake and increase temp, after a few seconds I hear a click but still get no voltage or heat. Electronic controls, but clock works and there are no error codes or any indication it's not working. Given what is between the control board and elements, I am thinking it's this relay, the only thing on the back of the oven: WHIRLPOOL BOARD, RELAY W/SHIELD, part number: 12001690A Is there a way to test that relay to know it's bad? Or is there something else that controls the temp/power to the elements?

magic chef gas oven approxiametly 15 years old oven temp will not go beyond 250 degrees