Customer called shop with a complaint of non responsive and SYCF error code.
Went out on first call on this, found burnedspot on main board (pn 242115239).
Returned today, put in a new board and plugged it in. Ice box fan and ice dispenser flap kept pulsing. User interface did not respond to me. Eventually the machine got bored and quit trying.
Now it's non responsive and flashing an SY CE error.
The tech sheet lists this as "a communication error" with no other info.
The burn spot on the board seems to correspond with the ice box fan and the ice system. (It's all right up next to the J6 connector and the solder traces seem to trace back to that connection.
The ice maker thermistor is dangling in the ice box and has about 1/2" of bare wire.
I am thinking replacing the ice fan and the ice maker would need to happen, and maybe replacing the UI. But it's not clear to me how I would diagnose the UI.