Rotary selector to have the quality of a Chinese children's toy for me. A shame for a brand manufacturer. We have attached a photo as the rotary knobs themselves grind because they are so inferior coated. How so looks a stove after the warranty period? Sunk the knob, he grinds away. Not an isolated incident!
The manufacturer may dubbed this damage to the rotary voters as minor and talks himself out with its warranty conditions, that the damage does not interfere with the usability. Several flock with this "problem" were withdrawn from us only out of goodwill, after much discussion and anger!