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Ambient Mechanical Ltd

Senior Chiller Service Technician

Toronto, ON, L4K 4A1, Canada

Experience: The successful candidate will have 7–10 years of commercial HVAC service experience, with significant hands-on experience servicing and troubleshooting chillers.
Posting language: English
Posted: Apr 24, 2026

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Original job description

Ambient Mechanical Ltd is seeking an experienced Senior Chiller Service Technician to join our service team. This position is intended for a highly skilled technician with advanced experience in commercial and industrial chiller systems, including troubleshooting, major service, rebuilds, commissioning, and customer support.

The successful candidate will be capable of working independently on complex equipment, supporting junior technicians, and representing the company professionally on critical service calls and major projects.

Key Responsibilities:

Perform advanced troubleshooting, service, maintenance, and repair on commercial and industrial chillers.

Work on centrifugal, screw, scroll, reciprocating, magnetic bearing, and modular chiller systems.

Diagnose complex mechanical, electrical, controls, refrigerant, oil, and performance-related issues.

Perform seasonal start-ups, shutdowns, operational inspections, and preventive maintenance.

Complete compressor inspections, teardown support, alignment checks, oil analysis, vibration review, leak testing, evacuation, and refrigerant charging.

Perform or assist with major repairs, including compressor replacements, tube inspections, eddy current testing coordination, control upgrades, motor diagnostics, and VFD or starter troubleshooting.

Review chiller logs, trend data, alarm histories, and operating conditions to identify deficiencies and recommend corrective action.

Support commissioning, recommissioning, and performance verification of chiller systems.

Provide technical guidance, mentoring, and field support to apprentices and junior technicians.

Communicate professionally with customers, property managers, engineers, contractors, and internal service teams. • Prepare detailed service reports, deficiency reports, repair recommendations, and quotation support notes.

Ensure all work is performed in accordance with company standards, manufacturer procedures, safety requirements, and applicable codes.

Participate in on-call rotation, emergency service, and overtime as required.

Qualifications:

The successful candidate will have 7–10 years of commercial HVAC service experience, with significant hands-on experience servicing and troubleshooting chillers. A valid 313A Refrigeration and Air Conditioning Systems Mechanic License and ODP certification are required.

Strong experience with major chiller manufacturers such as Carrier, Trane, York, Daikin, McQuay, Multistack, Smardt, Dunham Bush, or similar equipment is required, including both magnetic and non-magnetic chillers.

The ideal candidate will have advanced knowledge of refrigeration cycles, compressor operation, oil management, controls, electrical systems, starters, VFDs, and hydronic systems, along with the ability to read and interpret wiring diagrams, mechanical drawings, sequences of operation, service manuals, and manufacturer literature.

This role requires strong diagnostic and troubleshooting abilities, sound judgment when working with critical equipment, and the ability to work independently with minimal supervision. The successful candidate will also have a valid driver’s license with a clean driving record, strong communication, documentation, and customer service skills, and a demonstrated commitment to safety, professionalism, and quality workmanship.

Preferred Experience / Assets:

Factory training from Carrier, Trane, York, Daikin, Smardt, Multistack, or other chiller manufacturers is an asset but not required • Experience with centrifugal compressor overhauls, screw compressor repairs, or magnetic bearing systems. • Experience with starters, soft starters, VFDs, motor testing, and control retrofits. • Knowledge of building automation systems and chiller plant optimization is an asset • Experience with cooling towers, pumps, heat exchangers, plate-and-frame systems, and hydronic troubleshooting. • TSSA, pressure vessel, or pressure relief valve replacement knowledge and experience. • Welding/brazing, rigging, or millwright experience considered an asset. • Ability to assist with estimating, scope development, and technical review of repair quotations considered an asset

Leadership Expectations:

As a Senior Chiller Service Technician, you will be expected to lead by example, demonstrating a high standard of quality, safety, professionalism, and customer service. You will mentor and support apprentices and junior technicians in the field, while providing management with technical recommendations and input into job planning. You will also help identify training needs, recurring equipment issues, and opportunities to improve service delivery. As a senior representative of the company, you will be trusted to manage high-profile customer accounts and technically demanding service calls with confidence and professionalism.

What We Offer in a Unionized Position (UA Local 787):

Competitive senior-level wage based on experience and qualifications.

Company service vehicle.

Benefits package.

Pension or retirement plan

Paid training and manufacturer development opportunities.

Stable full-time employment with a reputable service company.

Opportunities for advancement into lead technician, supervisor, or technical specialist roles.

Overtime and on-call opportunities.

We thank all applicants for their interest; however, only those selected for an interview will be contacted.

Ambient Mechanical Ltd is an equal opportunity employer and welcomes applications from all qualified candidates.

Apply About employer

More about this job

Responsibilities

Perform advanced troubleshooting, maintenance, and repairs on complex commercial and industrial chiller systems. Provide technical guidance to junior technicians while ensuring all work meets safety and quality standards.

Requirements

Requires 7–10 years of commercial HVAC experience and a valid 313A Refrigeration and Air Conditioning Systems Mechanic License. Candidates must possess advanced knowledge of refrigeration cycles, electrical systems, and major chiller manufacturer equipment.

Skills

Chiller troubleshooting
Preventive maintenance
Refrigeration systems
Electrical diagnostics
Controls troubleshooting
Compressor repair
VFD troubleshooting
Hydronic systems
Technical mentoring
Service reporting
Commissioning
Leak testing
Refrigerant charging
Motor diagnostics
Safety compliance
Customer service

Benefits

Health insurance
Pension plan
Retirement plan
Paid training
Company service vehicle

Visa sponsorship

Not detected in the job text

Keywords

Chiller
HVAC
313A License
ODP Certification
Centrifugal
Screw
Scroll
Magnetic bearing
VFD
Hydronic
Preventive maintenance
Commissioning
Troubleshooting
Carrier
Trane
York
Daikin
Building automation
Cooling towers
Refrigeration
Electrical systems
Service technician
UA Local 787
Mechanical
Compressor
Eddy current testing
Motor diagnostics
Safety
Field service
Technical support

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