Commercial HVAC Service Technician

Job Title: Commercial HVAC Service Technician
Job Location: San Antonio, TX
Operating Company: Mechanical Reps Inc.
FLSA Status: Non-Exempt
Pay Range: $38-45/hour

Mechanical Reps Inc., a member of the AIR Control Concepts family, is the premier manufacturers' representative for HVAC products in Central and South Texas. Founded in 1974, our team provides exceptional products and an unprecedented level of service to engineers, contractors, and facility managers who demand responsiveness and expertise. Our greatest strength is uncompromising dedication to our customers.

We are seeking a highly skilled Combination HVAC Start-Up & Service Technician to join our field service team. This dual-function role combines commercial/industrial HVAC service with dedicated equipment start-up support for Mechanical Reps (MRi).

• Perform service, preventative maintenance, inspections, and overhauls on boilers, pumps, motors, VFDs, AHUs, FCUs, cooling towers, and HVAC systems.
• Diagnose and troubleshoot electrical, mechanical, and control system issues.
• Repair and replace defective components.
• Perform refrigerant handling in full compliance with EPA regulations.
• Conduct advanced diagnostics, pipe fitting, brazing, and system repairs.
• Analyze system data, trends, and control performance for optimization.
• Download and configure system programs and controllers.

• Conduct field installation verifications to confirm equipment is properly installed prior to start-up.
• Perform factory start-up procedures for equipment sold by Mechanical Reps (MRi), including pumps, boilers, fans, VFDs, cooling towers, AHUs, DOAS units, packaged rooftop units, VRF systems, and humidifiers.
• Troubleshoot commissioning issues in coordination with the MRi start-up team and equipment manufacturers.
• Deliver owner/operator training on new equipment, covering proper operation, maintenance schedules, and control interfaces.
• Execute warranty service and repairs for MRi-represented equipment within the warranty period.
• Serve as a knowledgeable field liaison between MRi, installing contractors, and end customers.

• Build strong customer relationships and communicate service findings and start-up results clearly.
• Educate customers on system operation and maintenance best practices.
• Mentor and support junior technicians; assist in training and development.
• Coordinate work on larger projects and lead multi-technician jobs.

• Complete service documentation, startup reports, and time tracking accurately and on time.
• Adhere to OSHA, company safety standards, and jobsite hazard assessments.
• Maintain service vehicle, tools, and inventory.
• Participate in on-call rotation as required.

• 5–7+ years of commercial/industrial HVAC experience.
• Demonstrated experience performing preventative maintenance, annuals, and major equipment repairs.
• Hands‑on experience with HVAC equipment start‑up, commissioning, or factory‑authorized procedures preferred.

• High School Diploma or GED required.
• EPA Universal Certification (608) required.
• OEM certifications preferred (Trane, Carrier, York, Daikin, or equivalent).

• Strong knowledge of HVAC systems, refrigeration cycles, and hydronic systems.
• Experience with cooling towers and condenser systems.
• Experience with pumps, motors, and piping systems.
• Experience with VFDs and building automation/controls systems.
• Experience with airside systems: VAV, AHU, RTU.
• Ability to read blueprints, schematics, wiring diagrams, and technical documents.
• Proficiency with diagnostic tools and service software.
• HVAC controls experience is a plus (BAS, DDC, BACnet, Modbus, etc.).

• Valid driver’s license with a clean driving record.
• Must be insurable under company vehicle policy.
• Ability to participate in an on-call rotation.
• Commitment to safety, compliance, and continuous training.

• Strong troubleshooting and problem‑solving skills across mechanical, electrical, and controls disciplines.
• Excellent written and verbal…