I have had issues with my Thermador Pro Series Dual Fuel 36" Range for a year and a half now. It was installed in 2005 and I started having problems with erratic oven temperatures that seem impossible to correct. They have replaced the Sensor, Oven Knob and Dial, Thermostat and something else I can't recall - TWICE! The Dial will not sit exactly on the temperature that I set the knob on. I'm at my wit's end. Has anyone else had a similar experience?