HVAC Service Technician III

About Us: 

Since 1980, DynaTen Corporation (a Comfort Systems USA Company) has delivered high-quality Commercial Construction and Service Solutions across the greater North Texas market. We partner with our clients to provide technical expertise and high-level execution on every project. As a result, DynaTen is a trusted provider of HVAC, Plumbing, and Building Automation Controls solutions. 

Our culture is built on accountability, teamwork, and a commitment to developing our people. We take pride in promoting from within, supporting both field and office teams, and delivering results the right way. We offer strong long-term career opportunities, excellent benefits, and a positive, team-oriented work environment. 

Position Summary 

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. 

Principal Duties and 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. 

Required 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. 

What you can expect 

• 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. 

EEO Statement 

Comfort Systems USA, Inc., together with its subsidiaries, provides equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, sex, sexual orientation, pregnancy or maternity, national origin, citizenship, genetic information, disability, protected veteran status, gender identity, age, or any other status protected by law. This policy applies to recruiting, hiring, transfers, promotions, terminations, compensation, benefits, and all other terms and conditions of employment. 

The statements contained in this document are intended to describe the general nature and level of work being performed by an employee assigned to this description. They are not intended to constitute a comprehensive list of functions, duties, or local variances. Management retains the discretion to add to or change the duties of the position at any time. 

This job description does not state or imply that these are the only duties to be performed by the employee in this position. Employees may be required to follow other job-related instructions and perform other job-related duties requested by an authorized person. All duties and responsibilities are essential functions and requirements and are subject to reasonable accommodation for qualified individuals with disabilities. The requirements listed are the minimum levels of knowledge, skills, and abilities. This document does not create an employment contract, implied or otherwise, and employment remains at will.