Troubleshoots, install, tests, repairs, modify, relocates, maintains, and calibrates refrigeration equipment, air conditioning equipment, pneumatics controls and auxiliary equipment such as drinking fountains, exhaust fans, supply fans and smoke purge fans etc. Environmental Factors: Works in indoor and outdoor environments that contain excessive heat, cold and humidity, excessive dampness, electrical energy, dust, fumes, solvents grease, oils, moving machinery with moving parts, moving object or vehicles and slippery or uneven surfaces.