I unplugged the unit. Let the evap thaw. Measured with an ohm meter the temp sensor, defrost sensor and evap heaters. Defrost sensor measured completely " closed". Put sensor into hot water and ice, the reading never changed. Ordered sensor from AP PROS, got the part extremely fast, installed part, freezer was making ice in an hour.
I did a lot of online research, too.
Thanks, AP PROS!
Freezer only down 3 days. Fridge side working.