We had a class with our refrigeration techs, and the topic of leaking and bypassing service “angle” valves and ball valves came up. One of the techs pointed out that most valves recommend loosening the top nut on ball valves and the packing nut on angle valves before turning the stem for maximum longevity of […]

This series of articles is one of those that will bug a lot of people because it will go against a lot of what you've been told about compressors, start capacitors, and inrush current. For that reason, I want you to work through a few thought experiments first and maybe even stop and try it […]

Photo by Brad Hicks at HVAC in SC Right off the top, let me state something loud and clear: The tool does not make the tech. Let that sink in before you move on. A good tech has a solid understanding of WHY they are doing what they are doing, the basic math of the […]