under counter fridge/freezer

Let me know if I'm in the wrong place, but thought someone here might be able to help! I have a new-to-me food trailer that I'm working on (starting a mobile coffee business) and I'm having some issues with the under counter fridge/freezer. It's getting power, the condenser fan is working and I have it turned up to max cooling. At this point it's been on for about 18 hours and doesn't really seem like it's cooling. I've been reading about refrigeration in general and it seems like most is forced air through vents, but the interior of this fridge/freezer has no vents- can someone tell me a little more about how this type of unit works, and what I might be missing? Any info helps. Pictures attached- thanks for reading!! ​ https://preview.redd.it/y3kv78e6te391.jpg?width=3024&format=pjpg&auto=webp&s=84add9485d6e2ae6857c41343fcea77f31a7b842 https://preview.redd.it/h6s3fae6te391.jpg?width=3024&format=pjpg&auto=webp&s=a106e49b74e061616b00950108e344b5c25b20c6 https://preview.redd.it/2on6g9e6te391.jpg?width=3024&format=pjpg&auto=webp&s=05d5a8a270b01fcf5849e9dbb28ebc808b25802a https://preview.redd.it/hiv8dbe6te391.jpg?width=3024&format=pjpg&auto=webp&s=4106088989b0f79c08d63d99b80c45118ddcfa85 https://preview.redd.it/ea31kce6te391.jpg?width=3024&format=pjpg&auto=webp&s=1930b1e8aef213fe3f4a675d6c0d889af8029e07 https://preview.redd.it/tjnv3de6te391.jpg?width=3024&format=pjpg&auto=webp&s=2ccf674ee6f7dd7a096739cdd90a0f6fa5374dd6 submitted by /u/AprilHamLincoln119 [link] [comments]