Job Description
Job Description
The AAON & LG HVAC Service Technician is responsible for the installation, support, start-up, commissioning, troubleshooting, maintenance, and repair of commercial HVAC equipment, with a primary focus on AAON and LG equipment. The technician will work directly with customers, service management, controls personnel, contractors, and manufacturers to diagnose and resolve mechanical and controls-related issues.
The ideal candidate will have strong commercial HVAC experience, excellent troubleshooting skills, and the ability to work independently while maintaining a high level of customer service and professionalism.
**Key Responsibilities
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**Service & Troubleshooting
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Diagnose and repair commercial HVAC equipment, including:
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AAON packaged rooftop units
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AAON air-handling equipment
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LG VRF systems
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LG heat-pump and heat-recovery systems
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DX and refrigeration systems
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Hydronic heating and cooling systems
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VFDs, motors, compressors, fans, and associated components
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Troubleshoot electrical, mechanical, refrigeration, and controls issues.
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Identify root causes rather than simply correcting symptoms.
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Perform system testing and verify proper operation after repairs.
**Start-Up & Commissioning
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Perform factory start-up and commissioning of AAON and LG equipment.
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Verify refrigerant charge, airflow, temperatures, pressures, electrical characteristics, safeties, and operating sequences.
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Complete manufacturer start-up documentation.
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Coordinate with controls technicians during BMS integration and functional testing.
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Assist with commissioning and troubleshooting of equipment connected to building automation systems.
**Preventive Maintenance
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Perform scheduled preventive maintenance on commercial HVAC equipment.
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Inspect coils, filters, belts, bearings, motors, compressors, electrical components, dampers, economizers, and refrigeration systems.
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Identify developing equipment problems and recommend corrective action.
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Provide customers with repair recommendations and equipment condition reports.
**Customer Service
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Communicate professionally with customers, facility managers, contractors, and other trades.
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Explain equipment problems and recommended repairs in a clear, understandable manner.
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Maintain a professional appearance and attitude while representing DMG.
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Respond to emergency and after-hours service calls as required.
**Documentation
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Complete accurate field service reports for every service visit.
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Document equipment condition, troubleshooting performed, readings, repairs, and recommendations.
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Include photographs, equipment information, and part numbers when appropriate.
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Maintain accurate labor, travel, and material records.
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Identify potential repair and replacement opportunities for the Service & Controls sales team.
**Required Qualifications
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3+ years of commercial HVAC service experience preferred.
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Strong knowledge of commercial HVAC systems.
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Ability to read electrical schematics and wiring diagrams.
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Strong mechanical and electrical troubleshooting skills.
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Knowledge of refrigeration fundamentals.
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Ability to use electrical and HVAC diagnostic instruments.
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Valid driver's license and acceptable driving record.
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Ability to work independently and manage multiple service calls.
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Strong written and verbal communication skills.
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Ability to work safely in commercial and industrial environments.
**Preferred Qualifications
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Experience servicing AAON equipment.
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Experience servicing LG VRF systems.
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AAON factory training or certification.
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LG VRF training or certification.
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Experience with equipment start-up and commissioning.
**Physical Requirements
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Ability to lift and carry HVAC tools and components.
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Ability to climb ladders and access rooftops.
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Ability to work in confined spaces and mechanical rooms.
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Ability to work outdoors in varying weather conditions.