When I moved, a small plastic tube from the back of the fridge was lost. The freezer works fine, but the fridge part freezes delicate food except on the very top shelf and on the right side middle shelf. Veggies freeze in both crisper drawers and on bottom shelf (above crispers). If I change the temp. to warmer, everything else spoils.

I was told by a Repair person that there was a small white tube missing from the back (behind the shelves about half way up) that helps balance out the temp. - circulate the cool air. Apparently it connects the circulating air from the fridge to the freezer.

I can't figure out which part(s) I need. HELP?

Thanks