Thanks for the question about the error code on your display.
This code indicates a problem in the defrost system. You can try the resetting mentioned by Expert Lyle, this may help for a while but if this reoccurs you will need to call for service.
I will add the link to service here: If you get to the point where you need to have a service technician diagnose and repair this failure, you can schedule service through this link:
Sears Home Services
If I can be of further assistance please reply with details and I will be happy to respond.
Thanks Ron H.