COL-2026-077 | Commercial HVAC Service Technician

Colwyn Group; Houston (TX); On-site; USD 47,000 - 58,000; Full time

Benefits offered by this job

Company vehicle

Weekly pay

Health insurance

401(k) plan

Paid time off and holidays

Job summary

Colwyn Group is seeking an experienced Commercial HVAC Service Technician to join its Houston field service team. The role offers full-time employment with competitive hourly pay, overtime opportunities, and a company vehicle for site work.

Responsibilities include diagnostics, preventive maintenance, and repair of VRF/VRV systems, RTUs, and commercial chillers across institutional, healthcare, and industrial facilities. EPA 608 certification is required.

Qualifications

• 5+ years of hands-on experience in commercial HVAC service, diagnostics, and repair.
• EPA Section 608 Universal Certification.
• Strong understanding of 3-phase electrical circuits and refrigeration cycles.
• Ability to read electrical schematics and mechanical drawings.
• Willingness to work overtime and participate in on-call rotation.

Responsibilities

• Perform preventive maintenance, inspections, and diagnostics on diverse commercial HVAC systems.
• Diagnose and repair electrical, refrigeration, and control faults; replace components as needed.
• Troubleshoot VRF/VRV systems, RTUs, and commercial chillers; assist with commissioning and controls.
• Interpret wiring diagrams and control sequences; support BAS/DDC interfaces.

Skills

HVAC field service

Diagnostics & troubleshooting

Electrical & refrigeration knowledge

Schematic reading

Customer communication

Tools

BAS/DDC control software

Diagnostic tools & laptops

Job description

Houston, United States | Posted on 11/05/2026

Colwyn Group is a staffing and recruiting firm headquartered in Austin, Texas, working across healthcare, technology, and executive search. We place candidates with employers across the US.An American Staffing Association member firm.

Job Description

Commercial HVAC Service TechnicianIndustry: Commercial MEP & Mechanical ContractingLocation: Houston, TX (Field Service / On-Site)Position Type: Full-Time, PermanentCompensation: $34.00 – $42.00 / hour (Commensurate with experience) + Overtime + Company Vehicle + Comprehensive MEP BenefitsAbout the OpportunityOne of the largest, premier Mechanical, Electrical, and Plumbing (MEP) contracting organizations in Texas is seeking an experienced, detail-oriented Commercial HVAC Service Technician to join its field service division in the Houston metropolitan area.The company delivers turnkey commercial installations, comprehensive retrofits, and preventative maintenance across prominent institutional, healthcare, commercial, and industrial facilities. This role offers stable year-round work, continuous training on cutting-edge systems, modern service vehicles, and clear internal growth pathways.Key Responsibilities1. Diagnostics, Service & MaintenancePerform routine preventive maintenance, seasonal inspections, and advanced mechanical diagnostics across diverse commercial HVAC systems.Diagnose electrical, mechanical, airflow, and refrigeration faults down to component-level failure.Replace and service key mechanical and electrical components, including commercial compressors, fan motors, VFDs, actuators, contactors, capacitors, valves, and dampers.Execute regulatory-compliant refrigerant recovery, evacuation, leak testing, and charging per EPA Section 608 guidelines.2. Advanced Systems TroubleshootingVRF / VRV Systems: Inspect, diagnose, and repair variable refrigerant flow equipment, including condensing units, indoor evaporator units, branch selectors, and integrated system controllers.Packaged & Rooftop Units (RTUs): Troubleshoot complex rooftop package units, split systems, and commercial heat pumps (specialized focus on premier manufacturers such as AAON and Daikin Applied).Commercial Chillers: Perform routine service, fluid circuit checks, and baseline troubleshooting on commercial chillers, associated pumping packages, and primary refrigeration loops.3. Commissioning & Controls CoordinationConduct system startups, commissioning verification, and post-repair operational testing.Measure and log vital operating metrics: superheat/subcooling, static pressure, airflow, temperature splits, voltage, and motor amperage.Read and interpret complex multi-wire schematics, ladder logic, control sequences, and mechanical drawings.Troubleshoot basic BAS/DDC control loops and network communication issues, interfacing with automation specialists when custom software integration is required.4. Field Operations & Customer ExcellenceRespond to scheduled service work orders, retrofit start-ups, and rotating on-call emergency service dispatches.Communicate technical findings, repair options, and equipment lifecycle recommendations professionally to building engineers and facility managers.Maintain clean, organized service documentation detailing diagnostic findings, parts used, labor hours, and customer sign-offs.Maintain a clean, organized, and properly stocked company service vehicle and ensure diagnostic tools and vacuum/recovery rigs remain calibrated and inspected.Qualifications & RequirementsRequired:Experience: 5+ years of dedicated, hands-on experience in commercial HVAC service, diagnostic troubleshooting, and repair.Licensing / Certification: Valid EPA Section 608 Universal Certification.Electrical & Refrigeration: Strong understanding of 3-phase electrical circuits, mechanical refrigeration cycles, line voltage, and safety disconnects.Blueprint & Schematic Reading: Proven capability to read and trace electrical schematics, line diagrams, and HVAC sequence of operations.Driver’s License: Valid driver’s license with an insurable, clean driving record.Physical Demands: Ability to lift up to 50+ lbs, climb extension/fixed ladders, work on commercial rooftops, and operate in Texas mechanical room environments.Availability: Willingness to work overtime and participate in an on-call emergency service rotation.Preferred:Direct factory training or field experience on VRF/VRV systems.Hands-on familiarity with AAON rooftop units and Daikin Applied equipment.Foundational knowledge of commercial water-cooled or air-cooled chiller operation.Comfort with computerized diagnostic tools and service software.Compensation & Total RewardsHourly Rate: $34.00 – $42.00 / hour (based on experience, certifications, and technical proficiencies).Weekly Pay: Direct deposit issued every week.Company Vehicle: Take-home service van with company fuel card and toll tag.Travel Pay: Paid travel time and daily per diem for any out-of-area project assignments.Overtime Availability: Plentiful overtime opportunities at time-and-a-half (1.5x).Retirement: 401(k) retirement savings plan.Healthcare: Comprehensive medical, dental, and vision insurance options.Insurance Protection: Company-paid Life & AD&D, Short-Term Disability, Long-Term Disability, and supplemental coverage.Paid Leave: Accrued Paid Time Off (PTO) and paid company holidays.