What we have is a Kelvinator fridge that came with the house. It works great, so cold that we can't keep veggies in it. It's our number 2 fridge and it's in the bar area of the basement. It even has a tap hole in the door! Anyway, model CD-7-R, serial 4181432. I need to learn how old the unit is, and if there are any modern retro-type compressor assemblies that will fit that will make the unit more efficient. thanks to all!