With rotisserie, and I'm wondering about the left rear burner.  Is that some kind of temperature control sensor?

I would get this for my sister if she wanted it.  It's an updated version of her frumpy '40s-'50s Wedgewood, which I hate the look of, and since she's considering remodeling but wants to keep her stove, a more modern version would be a big improvement.

Thanks Bob.  Should we assume that at this point it's brain dead and there's no hope for a transplant?

I have almost never seen one of these on a gas range that did not work perfectly And if the user has a lick of mechanical sense this feature often becomes your favorite burner quickly.

On these gas BWAB controls you can set the flame size and then turn the dial the other way and set the temperature you want to maintain.

It is perfect for using a skillet, deep frying, keeping a pot of coffee warm all day without ever letting it boil, cooking rice,  You can bake a cake or bake potties in a covered pan etc and the list goes on and on.

John L.