frigidaire freezer wont cool, and light dont go out with door shut.

Hello!
I have a frigidaire stand up freezer, i dont know the model number but here is a pic of what it looks like. the problem i am having is the light wont turn off and the display shows door open alarm. also it wont cool at all. compressor runs and it all seems to be working but it wont get any cooler then room tempature. anyone have any ideas where to start? thank you!

Scott