Written and presented by Jim Johnson, this HVACR technician training course presents an overview of the fundamentals of schematic diagrams. With a firm understanding of the fundamentals of wiring ...

Well-known industry author and instructor Jim Johnson is offering a new video for technicians who want to sharpen their troubleshooting skills. "This HVAC training video program, is available in DVD ...

We’ve all had those long days where you wish you could just find the electrical problem and get to the next job — or go home! The best way to try and avoid these frustrating days is to review prints ...