Jenn-Air speed microwave oven - $175 (Plano)

This is a Jenn-Air JMC2427DSOO Microwave speed oven.
It has power and works, but will throw an error code F2E1, stuck key, and then the functions stop working (still has power but won’t let you select a function).
You can reset by selecting the demo mode and then deselecting the demo mode, but will eventually get the error code again.
The oven retails for $2700, and is a built in model that is hard wired.
It was manufactured in May 2016.
It has the original additional rack, browning pan and grabber.
There is probably a permanent fix, but it is sold as is.