My oven which is just over 1 year old works perfect except while using the bottom oven it does not regulate the temperature being programed. No matter what we program the Temp to be it gets very very hot. Even when programming it for only 170 degrees.
Does the smaller oven over heat too?
If so the temp sensor is probably bad, part Part Details - MAYTAG Sensor, ovn / long elec., part number: 12001656
Nat
If the temp is as far off as you are saying, it will most likely be the control board. You could try the sensor, but the differential in the setting of the temp, and actual temp sound very far apart. Tom ApplianceEducator.com
The temp sensor can be checked, see the tech sheet
Here is the parts breakdown
Model MER6755AAS
Here is the tech sheet
http://www.servicematters.com/maytag_library/docs/16023459.pdf
Here is the service manual
http://www.servicematters.com/maytag_library/docs/16023416.pdf
Thanks to everyone that responded however, I tested the sensors but no joy. Looks like we are going out to eat for the holidays 
nonetheless
(kayakcrzy) I believe you are right in reference to the control board, do you by any chance know how much that runs (Model MER6755AAS). Thanks again for everything.
George
(Below is my orginal post)
My oven which is just over 1 year old works perfect except while using the bottom oven it does not regulate the temperature being programed. No matter what we program the Temp to be it gets very very hot. Even when programming it for only 170 degrees.
Everywhere I checked it is $165-$175. But I checked this website, and it said it was $104.99. I question that, because, I can buy that part, at a place where I get some unbelievable pricing, and that is really cheap. Call them to be sure. The part # is 74009992. If so, get it from here. Have a great Thanksgiving anyway. Think of the bright spot here. No mess to clean up. You know 8 hours of cooking, and eaten in thirty minutes. Tom ApplianceEducator.com