Maintain, troubleshoot, repair, and replace HVAC/R equipment, including packaged rooftop units, oil burners, gas burners, split systems, chillers, pumps, refrigerated air dryers, heating equipment, VRF heat pumps, air compressors, and related systems. Perform corrective and preventive maintenance on fans, blowers, motors, filters, belts, compressors, Variable Frequency Drives, AC vents, ducts, pumps, heat exchangers, chilled water, hot water, and other fluid systems.