How to Troubleshoot the Kenmore 790 Combination Microwave Oven

Make certain the microwave and wall oven are plugged in to a working and grounded power outlet, if the problem is that the microwave does not turn on or function. Check your home's breaker box to see whether a fuse is blown or a circuit breaker needs to be reset.

Press "Stop/Clear," if pressing the control pads does not work. This can happen if you opened the door before a cooking process ended, or if you did not choose a cooking cycle within three minutes of opening and shutting the microwave door.

Touch the clock icon, followed by "0" and "Stop/Clear," if the microwave time of day or timer is counting very rapidly and does not operate. This indicates the microwave is in demo mode.

Place a cup of water in a microwave-safe container in the microwave oven, and heat it for one minute. Open the microwave oven door, and touch the water carefully. If the water is not warm, contact an authorized service technician for assistance.