I attempted to cook a baked potato in our KitchenAid over the range microwave (KHMS2040WSS). Please note that using the "sensor setting" was nothing new to me, I have used the "Baked Potato" sensor setting many times before with good results. This last time though went horribly wrong, the potato wasn't baked when I returned, it was charred to a black ash. It wasn't even recognizable as a potato. The microwave safe dinner plate that it was on had cracked into pieces and started to adhere to the glass rotating dish. The rotating glass dish itself fractured right at the center and the plastic pivot almost entirely melted. The white interior was stained dark gray with smoke soot.
I called Sears because the microwave is only 11 months old. Sears sent out an appliance specialist from A&E Service. The A&E technician performed a few tests and found the appliance was working properly and had not malfunctioned. The finding was that it was my fault as the consumer. My next call was to Whirlpool customer service at 1-800-253-1301. They were unable to help for two days because no report from A&E was available. Finally on day three, the office at 1-800-253-1301 called A&E and got the report. Then the Whirlpool representative stated they were not going to assist because it was found that the potato caught on fire not the microwave. I asked for a supervisor and was transferred to another office (I know it was another office because the toll free number changed to 1-866-640-7146). At any rate, after an hour long call which truly amounted to wheel spinning, the "supervisor" agreed to call A&E again to see if any other options were available. Much later that same day, he left a voice mail stating that Whirlpool would help with the cost of parts.
Ugh, I am so upset! The microwave is virtually new and I didn't choose how long to cook the potato, it was supposed to sense this and cook it accordingly. I have had $99 microwaves perform for years without incident. Then you really think that you are doing yourself a favor by branding "up" to KitchenAid and paying the extra cash for nothing. Has anyone else had this experience where the sensor setting overcooking something to the point of charring, smoke, fire etc? Have you contacted Whirlpool and if so, with what result? I feel that they should at minimum fully restore the microwave for no cost. Optimally, I would like to have a new microwave or a full reimbursement.

