Okay, lets assume everybody knows how to calculate evaporator superheat on an expansion valve system. These being givens: Low Temp = 4 to 6 degrees F. Medium Temp = 6 to 8 degrees F. And High Temp = 8 to 10 degrees F.


Here is one that confuses alot of techs and will create an interesting debate I think.

How many degrees superheat should you expect to see with a capillary tube system that is operating correctly, and why?

(Sorry, I know alot of you use C and K degrees.)