Product review (2 stars): This unit is not an original Jenn Air replacement cartridge ...
This unit is not an original Jenn Air replacement cartridge.  There is a 7/8 inch wide metal strip around the perimeter of the cooktop. Larger pans will be partially sitting on this strip which has a 1/16 inch high lip impeding the heat from reaching the pan.  The unit works  well - it's just not as efficient.