Special Knowledge/Skills: Knowledge of electrical circuits, wiring and operating principles of motors Knowledge of current electrical codes and ordinances Knowledge of HVAC repairs, maintenance, and installation techniques Ability to read blueprints, schematics, and written reference material Ability to follow written and verbal instructions Ability to perform mathematical calculations Ability to diagnose and resolve problems Ability to use hand and power tools, refrigeration recovery equipment, vacuum pumps, refrigeration gauges, multi-meter, etc.