Our microwave - will not power on at all. It was accidentally turned on for 20 minutes but was only intended to be using the timer function. Since then it will not work. All the plugs work and the breaker did not trip. Could it just be the smartboard? We have examined all the internal wiring and does not appear burnt or fried.
Answer Hello Krisha,
You may have gotten really lucky since the complaint mentions that the unit will not power on at all. This sounds like you may have just blown the cavity thermostat WB27X10810. If this turns out to be the case, it can be accessed, tested, and replaced without even pulling the unit down from its' installation. You can actually test this component without any special test equipment. Now you absolutely must pay attention to me here as I don't want anyone hurt or killed. Unplug the unit and remove the two screws along the top for the removal of the air grille. The air grill should now slide to the left and come off. Now there should be two black wires leading from the control side toward the left of the unit almost in the middle. These two wires will lead to the thermostat which, most of the time can be slid out of the clips that hold it to the top of the cavity and you can access the part well enough to remove the wires. If you TEMPORARILY clip the wires to one another and plug the unit in, if it was bad, you will now have a clock display. UNPLUG the unit again and order a replacement part. Do not leave this component bypassed because it creates a fire hazard as per the manufacturer. I mean, the manufacturer has documented cases of fires in customers' homes due to this thermostat being bypassed. My primary concern is for the well being of you, your family, and your home.
Please let us know if we can assist you further.