[smegger001]

The problem only happens when no one bothers to learn how something works. Look at all of those big iron systems out there that few people know how to program, there is reason Cobol and Fortran programmers still make good money.

Oh and refrigeration is simple, it is just an application of the ideal gas law PV=nRT, and a pump. Refrigerant is compressed then cooled through use of a heat-sink then pumped into the refrigerator and allowed to expand where the refrigerant absorbs thermal energy and is pumped out and repeated.

[TrevorJ]

I'm not sure it's a problem. It's encapsulaiton. Systems should be designed so that there is a difference between the knowledge required to operate the device and the knowledge required to design/service it.