We had ours get cold but there was a lot of moisture droplets on the fridge ceiling because of the high humidity it finally remedied itself after a few hours
2017 Grand Design Reflection 303RLS towed by a 2016 GMC 2500HD gas with Andersen hitch and B&W turnover ball mount.
I just had this issue a few days ago. Normally the fins in the fridge start to get cold quickly, but in the hot weather, it was still room temp 2 hours later. Just had to wait longer. Strange that the freezer was freezing, and the fridge was room temp, but it worked itself out.