It has been done but u will need to do a few things.
1) Clean it out with bleach water, then wipe it out again with water and let it dry. check for smells if you smell anything, repeat.
2) If you plan on plugging it back in a temp controller to keep temp 60* or above. A Johnson controller from a brewing supplier seems to be the #1 choice. This will also help on the electric bill.
3) Use beads or a Cigar oasis to humidify depending on size, # of boxes stored in the fridge. More boxes = more stabile, empty boxes will also help.
I have a friend who uses a chest freezer with no problems and after purchasing a Johnson controller and Cigar oasis for temp control leaves it unplugged except during the hottest summer months.
Good Luck
Rob