The AEC Store now offers HVACR training DVDs by Jim Johnson of Technical Training Associates. Some of the DVDs include: Electrical Fundamentals for HVACR Technicians; Refrigeration Fundamentals For HVACR Technicians; Uncomplicating The Heat Pump: Electrical Systems Troubleshooting; Uncomplicating The Heat Pump: Refrigeration & Air Flow Systems; Using Schematics to Troubleshoot HVACR Electrical Circuits, Part 1; HVACR Electrical Troubleshooting: Deciding Where To Begin; HVACR Electrical Troubleshooting: Component Testing; Semi-Hermetic Compressors: Testing, Servicing and Isolating; Understanding Fan Relays and Multiple Speed Motors; Understanding TXV Refrigeration Systems: Superheat and Subcooling. Click on the link below for more information.