Induction cookware not working with some induction cookers We have a Kitchen Aid cooktop and bought a 7 piece Kitchen Aid cookware set.  Six pieces work fine, one does not.  The 1.5 Q pan will not work on the cooktop.  But it works on the Panasonic induction hot plate that we had purchased prior to getting the cooktop.  It is magnetic and the concavity of the bottom is slightly less than the 2Q pan.  I am guessing it is a manufacturing defect, but I cannot figure what it might be.  Any ideas?
I have experienced something very similar, and it was because the pot was too small in diameter, so was not being sensed by the hob (range top).  Higher end, professional induction hobs do not turn off as easily if the pot is pulled away for a second.  Cheaper ones I have seen are almost on a hair trigger.  So if your pot is small, and not perfectly centered, the sensor will trip and the range will shut off.