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 ...

TROUBLESHOOTING Wiring diagrams can aid a technician in many ways. They allow a technician to systematically troubleshoot a problem. By analyzing the system’s wiring diagram, a technician can see ...