The basis of almost everything we discuss here on ExtremeTech is the transistor -- but just above that is a topic that we usually skirt around because no one, even hardcore nerds, really know ...

According to Johnson, "Using Schematics To Troubleshoot HVAC/R Electrical Circuits, Part 1" came about because of feedback from the industry. "It’s shorter than our fundamentals training videos, and ...

Even if there were parts and schematics, unless you can do it yourself like many of us can, paying someone to do the repair is probably infeasible. Times have changed.

According to Johnson, "Using Schematics To Troubleshoot HVAC/R Electrical Circuits, Part 1" came about because of feedback from the industry. "It’s shorter than our fundamentals training videos, and ...