Sr. Commercial HVAC Service Tech

CalTek Staffing; Irvine (CA); On-site; USD 55,000 - 62,000; Full time

Job summary

CalTek Staffing is seeking a Senior Commercial HVAC Technician in Irvine, CA. This role performs advanced diagnostics, preventive maintenance, repairs, and commissioning on commercial and industrial HVAC equipment, and leads junior technicians in the field.

You will diagnose complex mechanical, electrical, and controls issues, oversee large projects, and maintain strong client relations while adhering to safety and codes.

Qualifications

• 7–10 years of commercial HVAC service experience.
• Extensive experience servicing rooftop units, split systems, package units, heat pumps, exhaust systems, and makeup air equipment.
• Strong understanding of refrigeration systems and electrical troubleshooting.
• Ability to read wiring diagrams, schematics, blueprints, and sequences of operation.

Responsibilities

• Perform preventive maintenance on commercial HVAC systems per programs.
• Diagnose and repair complex HVAC, refrigeration, and ventilation systems.
• Lead HVAC equipment replacement and retrofit projects and coordinate installations.
• Diagnose and troubleshoot building automation and control systems to optimize energy use.
• Provide technical guidance and mentorship to apprentices and junior technicians.

Skills

Advanced HVAC troubleshooting

Refrigeration diagnostics

Electrical diagnostics

Building automation systems

VFD diagnostics

Project coordination

Customer communication

Documentation

Job description

Senior Commercial HVAC Technician Position Summary

The Senior Commercial HVAC Technician is responsible for independently performing advanced diagnostics, preventive maintenance, repairs, equipment replacements, and system commissioning on commercial and industrial HVAC equipment. This position serves as a lead field technician and technical resource for junior technicians, ensuring work is performed safely, efficiently, and in accordance with company standards, manufacturer specifications, and applicable codes.
The Senior HVAC Technician is expected to diagnose complex mechanical, electrical, controls, refrigeration, and airflow issues; provide detailed repair recommendations; oversee large-scale HVAC projects; and maintain strong client relationships while representing the company in a professional manner.

Essential Duties & Responsibilities Preventive Maintenance

Perform and oversee complete preventive maintenance programs for commercial HVAC systems including:

• Replace and clean HVAC filters.
• Inspect and clean condenser and evaporator coils.
• Inspect and adjust belts, pulleys, and sheaves.
• Lubricate bearings, motors, and moving mechanical components where applicable.
• Verify operation of thermostats, sensors, relays, and control systems.
• Inspect contactors, capacitors, transformers, disconnects, and electrical components.
• Tighten electrical connections and inspect for overheating or deterioration.
• Measure and record voltage, amperage, refrigerant pressures, superheat, subcooling, temperatures, and airflow readings.
• Inspect blower assemblies, fan motors, bearings, shafts, and fan blades.
• Inspect condensate drain pans, drain lines, and condensate pumps.
• Verify proper operation of safety controls and equipment sequence of operation.
• Identify equipment deficiencies and recommend corrective repairs.
• Complete detailed maintenance reports and asset condition assessments.

Service, Troubleshooting & Repairs

• Diagnose and repair commercial HVAC, refrigeration, and ventilation systems.
• Troubleshoot complex electrical, mechanical, refrigerant, and controls-related issues.
• Repair rooftop units, split systems, package units, heat pumps, exhaust fans, makeup air units, VAV systems, and related equipment.
• Perform advanced diagnostics on compressors, fan motors, economizers, control boards, sensors, VFDs, and electrical circuits.
• Troubleshoot power distribution, low-voltage controls, and building automation interfaces.
• Perform refrigerant leak detection and repair.
• Recover, evacuate, and charge refrigerant systems.
• Perform compressor replacements and major equipment repairs.
• Respond to emergency service calls and critical equipment failures.
• Develop repair scopes and material requirements for corrective work.

Equipment Replacements & Installations

• Lead HVAC equipment replacement and retrofit projects.
• Install rooftop units, split systems, exhaust fans, make-up air units, and associated components.
• Coordinate crane lifts and rooftop equipment replacements when required.
• Perform equipment startup and commissioning.
• Verify proper airflow, ventilation, refrigeration operation, and system performance.
• Assist in project planning, scheduling, and execution.

Controls & System Optimization

• Diagnose and troubleshoot building automation systems and HVAC controls.
• Calibrate thermostats, sensors, and control devices.
• Verify proper economizer operation and energy-saving sequences.
• Optimize equipment performance and recommend energy-efficiency improvements.
• Analyze operating trends and identify opportunities to improve system reliability.

Leadership & Training

• Provide technical guidance and mentorship to HVAC apprentices and mid-level technicians.
• Assist with field training and development of junior personnel.
• Review completed work for quality and compliance.
• Support service managers with technical troubleshooting and project planning.
• Assist with estimating repairs and replacement projects.

Safety & Compliance

• Enforce company safety policies and OSHA requirements.
• Perform lockout/tagout procedures during servicing and repairs.
• Ensure compliance with EPA refrigerant handling regulations.
• Maintain safe operation of company vehicles, tools, and equipment.
• Perform work in accordance with local building, mechanical, and electrical codes.
• Maintain a clean and professional job site.

Documentation & Customer Relations

• Complete detailed service reports, inspection reports, and repair quotations.
• Document equipment deficiencies and provide recommendations for corrective action.
• Communicate directly with property managers, facility engineers, tenants, and customers.
• Maintain professional appearance and customer-focused service at all times.

Qualifications

• Minimum 7 to 10 years of commercial HVAC service experience.
• Extensive experience servicing commercial rooftop units, split systems, package units, heat pumps, exhaust systems, and make-up air equipment.
• Strong understanding of refrigeration systems and electrical troubleshooting.
• Ability to independently diagnose complex HVAC system failures.
• Experience performing compressor replacements and major equipment repairs.
• Ability to read and interpret wiring diagrams, schematics, blueprints, and sequence of operations.
• Familiarity with building automation and energy management systems.
• Valid driver's license with acceptable driving record.
• Ability to work independently with minimal supervision.

Knowledge & Skills

• Advanced HVAC troubleshooting.
• Refrigeration diagnostics and repair.
• Electrical diagnostics up to 480 volts.
• Building automation system troubleshooting.
• VFD diagnostics and programming.
• Airflow balancing and ventilation diagnostics.
• Equipment startup and commissioning.
• Project coordination and leadership.
• Customer communication and repair recommendations.
• Strong organizational and documentation skills.

Contract to Long-Term Hire Pay is $40-$45/Hour