Performs entry-level heating, ventilation, air conditioning and refrigeration (HVACR) mechanical work. Works under close supervision, with minimal latitude for the use of initiative and independent judgment. Description of Duties • Installs, repairs, and performs preventative maintenance on basic air conditioning and heating systems.• Performs and/or assists in calibrating, installing, maintenance, and repair of pneumatic thermostats, air handlers, refrigeration equipment, ice makers, compressors, fans, blowers, motors, water pumps, insulation, valves, boilers, and all other related equipment and devices.• Completes routine maintenance chores, such as cleaning units, filter replacement, rust removal and repainting, draining and filling oil reservoirs.• Completes and closes work orders and enters time worked and materials used on portable devices.• Assists in the installation of new systems and/or the replacement of old systems.• Assists with equipment overhaul and maintenance to includ...