Product review (1 stars): A terrible product
The Kenmore pro series cooktop control knobs are a cheap plastic.  The break and melt with heat.  There is no recall or warranty for the defective product and Sears has the gall to charge $220. for a replacement set.  They no doubt coast about fifty cents to make.  After spending spending hours on the phone with numerous Sears "customer service" people in the Philippines the Texas. then Sears headquarters I gave up.  Customer service built Sears and the lack of customer service will be the end of Sears.  A great cooktop, with defective control knobs and zero customer service.