We have 2 mini-fridges in our garage and both the frezzer parts are frosted up, but the beer is still very cold. I'm not sure if this is the same as "iced up".
The part about "several days" at a condition where bacteria can grow would concern me. Are you sure your thermo is right?
Big BarBChef built in to the Outdoor Kitchen, Weber kettle, 1 UDS, Little Chief Electric, 2 Propane Fish Cookers/Turkey Fryers,
a swinging grate over my Fire pit, Big Pig Cooker, SJS.
"Nice talkin' to ya"