HVAC Service Technician III

About the Role

The HVAC Service Technician III independently diagnoses, services, and repairs complex commercial HVAC systems and specialized equipment. This advanced technician role conducts detailed system and airflow diagnostics, manages significant customer interactions, and supports high-quality service execution.

Responsibilities

• Service KKT equipment, cooling towers, IntelliPak units, SCUD units, pumps, and other assigned commercial HVAC equipment.
• Independently service and troubleshoot complex HVAC systems.
• Perform light- through heavy-commercial HVAC work.
• Conduct advanced airflow diagnostics, duct balancing, and static-pressure testing.
• Work directly with customers to support HVAC maintenance, repair, and equipment-replacement needs.
• Troubleshoot HVAC issues and correct mechanical failures within the technician’s demonstrated level of proficiency.
• Follow established safety requirements and model safe work practices.
• Represent DynaTen professionally as a direct customer contact.
• Communicate equipment conditions, work performed, recommendations, and follow-up needs clearly to customers and Service leadership.
• Complete required service documentation accurately and on time.
• Maintain tools, equipment, vehicle, and work areas in a safe and professional condition.
• Perform other duties as assigned.

Qualifications

• At least 7-10 years of HVAC Service experience.
• Expert knowledge of HVAC systems in commercial and industrial settings, including refrigeration cycles, psychrometrics, and system-efficiency optimization.
• At least 3-5 years of experience diagnosing and troubleshooting high-end, multistage, variable-speed, and VRF/VRV systems.
• At least 5 years of complex mechanical, electrical, and refrigerant troubleshooting and repair experience.
• At least 5 years of electrical and controls experience, including interpretation of complex wiring diagrams, low- and high-voltage circuits, and advanced control logic.
• EPA certification and Texas TDLR registration.
• Demonstrated technical capability with a customer-service mindset.
• Strong verbal and written communication skills.
• Commitment to integrity, safety, and quality.
• Positive and self-motivated approach.
• Ability to pass a pre-employment drug screen and background check.

Preferred Qualifications

• Advanced manufacturer or equipment certifications.
• OSHA 10 certification.

Benefits

• Exceptional health, dental, and vision insurance.
• Paid Employee-Only Medical Coverage.
• In-house and manufacturer-led training and leadership development.
• Long-term career growth into operations, sales, technical, and/or leadership roles.
• Comprehensive benefits package and employer-sponsored professional memberships.
• 401(k) match, PTO, holiday pay, and more.
• Stable work with a 40-hour guarantee.

Working Conditions

Work is performed in customer facilities, mechanical rooms, rooftops, and indoor and outdoor service environments. The role may require standing, walking, climbing ladders, bending, lifting, using tools, working around energized mechanical and electrical equipment, and exposure to weather, noise, and non-climate-controlled conditions. Required PPE and all company and customer safety procedures must be followed. Schedule flexibility and participation in after-hours or on-call work may be required based on service needs.

DynaTen Corporation, a Comfort Systems USA Company, has been a trusted provider of HVAC, Plumbing, and Building Automation Controls solutions in North Texas since 1980. Our culture emphasizes accountability, teamwork, and professional development, with a strong focus on promoting from within and fostering a positive, team-oriented work environment.