Product review (1 stars): Avoid Jenn-Air
Jenn-Air has a reputation as a top of the line appliance.  Perhaps it was once; before Whirlpool bought them.  Now Whirlpool, which thanks the the absence of serious anti-trust law enforcement makes most familiar appliance brands, seems to save money by producing parts for all its lines that are except with respect to surface appearance similar in construction.  When it comes to burner knobs it seems to have chosen to make them suitable for its least expensive lines and then use them on all its products.  These plastic knobs break from being turned, and more outrageous they can cost upwards of $25 each to replace.  What a gimmick; no telling how much Whirlpool makes on them.  Why should they spend a few cents more to make metal knobs for its supposedly best products when it can count on huge profits from replacement knobs.
  And when I inquired about a warranty replacement for a ceramic cooktop that the repairman certified as broken because of heat, I was told it would be for free.  But there was a Catch-22.  To replace the cooktop certain connections had to be pulled out and although the unit was only about 3 years old, they had rusted in.  Jenn-Air would not cover the cost of pulling them out and replacing them under their warranty, which meant we would be paying $400 or $500 if I recall correctly.  So the knob issue is but a revealing tip of a larger iceberg, which is why I will never buy another Jenn-Air appliance and advise others to avoid Jenn-Air at all costs.  You are buying glitz and an outdated reputation at a very high price.  Coincidentally, our Jenn-Air microwave convection oven just stopped working for no apparent reason three weeks ago.  I expect it could have been repaired for less than the cost of a new one.  Perhaps it was even under warranty.  But I so wanted no part of Jenn-Air that after consulting Consumer Reports I bought a GE; I wish we had installed all GE - or any brand other than a Whirlpool product - in the first place.