If you did not separate out the fridge for depreciation, you just had it part of the house. A 27.5 year depreciation that you can calculate. You might have made or lost some money. You should depreciate the new one stand alone, shorter depreciation schedule.

If you did not separate out the fridge for depreciation, you just had it part of the house. A 27.5 year depreciation that you can calculate. You might have made or lost some money. You should depreciate the new one stand alone, on the 5 year depreciation schedule @littleadv notes in his answer.