Factory installed Norcold fridge cooling unit compared to a replacement cooling unit built by Arcticold. This video shows the major differences between the Factory installed Norcold and the Arcticold replacement unit. Both units will fit into the factory Norcold refrigerator utilizing the factory mounting holes but when comparing the two, you will notice that the Arcticold unit is much larger in size and weight. This is due to the oversized condenser and the much larger absorber coils.