Freezer not cold

Hi,

I moved into a house where the owner has a freezer that they haven’t used in a few years. It’s a Frigidaire MFU21M3GW1 upright freezer. There seems to be no light in the unit either.

I plug it in and the pump works but it doesn’t get cold. I left it going all night. Any recommendations of where to start to troubleshoot this problem?

Thanks for the help,

~Tim