Jenn Air Oven Problem
The only electronic part of this ovens control system is the clock, the oven will bake and broil just fine without the clock working.
You do need the clock to do timed bake or to Self-Clean the ovens, the clock may be able to be rebuilt, but it can also be disconnected and the relay by passed then the oven could still SC.
What is their real complaint with this oven?