SOURCE: knob not working and some burners not heating
The switch under that knob is bad. It's called an infinite switch. As far as the elements go, first thing to check is for proper voltage (220) to the cooktop. Let me know what you find.
SOURCE: Jenn-Air Gas Cooktop Model CVGX2423
Just had this problem today on our seven or eight year old Jenn-Air cooktop. When using the front right burner all ignitors would continue to fire until I turned off the burner. The three other burners worked correctly. After trying all the obvious soulutions w/o success I pulled off that burners control knob and the rubber seal which exposed the valve. Their was a bunch of crud in there. I put a small (one inch) paint brush in there and vigorusly loosened all the crud. I then inserted the nozzle of our central vac - which just happened to fit perfectly - and sucked all the stuff out. I repeated the proceedure a couple more times, reassembled the knob and started the burner. Worked just perfectly!!! YMMV. Good luck.
SOURCE: Jenn-Air electric stove top - burners/fan won't come on
I had the same problem. Went to an appliance store that carries Jenn Air. Replaced both plug in units. Now they work perfectly and it cost less than $350 total! Good Luck!
SOURCE: Gas Jenn Air Cooktop Issue with Electric Starter
Did you spill water near/on knobs? if so leave to dry out for 24 hours. If still clicking after 24 hours one of the switches has shorted out and needs to be replaced. You can find which one with a multi meter/condinuity test. Hope this helps...Good Luck
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