HVAC Service Technician (Refrigeration & Air Conditioning Systems Mechanic)

DILFO; Ottawa; On-site; CAD 75,000 - 95,000; Full time

Job summary

DILFO is hiring a Journeyperson – Refrigeration & Air Conditioning Systems Mechanic (313A) to maintain, troubleshoot, repair, and optimize HVAC and refrigeration systems for commercial, institutional, and industrial sites in Ottawa. You will ensure reliability, performance, and client satisfaction through timely service and high workmanship.

The role requires a CoQ 313A, G1 license, and at least 5 years of service experience, with a valid Ontario driver’s license.

Qualifications

• CoQ 313A Refrigeration & Air Conditioning Systems Mechanic required.
• Gas Technician License (G1) required.
• Minimum 5 years in service/maintenance.
• Ontario G class license with insurable driving record.
• Experience with commercial/industrial HVAC/refrigeration systems.

Responsibilities

• Respond to service calls to diagnose and repair HVAC/refrigeration issues.
• Perform preventative maintenance and component replacement.
• Troubleshoot electrical, mechanical, and control systems.
• Repair or replace compressors, valves, motors, sensors.
• Recharge refrigerants and verify system operation.
• Prepare service reports and recommendations for clients.
• Communicate with clients about performance and needs.
• Participate in on-call rotation and after-hours calls.
• Mentor apprentices and junior technicians.

Skills

Diagnostics

Problem-solving

System charging

Leak detection

Electrical testing

Controls verification

Refrigerants & environmental standards

Client service

Independent work

Education

Certificate of Qualification – 313A Refrigeration & AC Systems Mechanic

Gas Technician License – G1

Job description

Headcount Type: Existing

Application Deadline: November 2, 2026

The Company

DILFO is proud to be trusted by the Ontario construction community to deliver the best for our clients’ needs. We design, install, and provide maintenance for HVAC, heating, cooling, refrigeration, and plumbing systems for large scale projects across different industries. Our team of skilled individuals shares a vision of building with integrity and collaboration to bring quality and innovation to our work every day, and we are honoured to have been recognized by the Ottawa Business Journal as one of Ottawa’s Best Places to Work.

The Team

DILFO has a strong team culture that heavily invests in team member wellness and our community. We host regular social events including Pub nights, golf day, pizza Fridays, and more. We are extremely invested in our local community, partnering with the YMCA for the Cycle for Strong Kids and other programs, donating to the Ottawa Food Bank, partnering with Boys and Girls Club Ottawa to create opportunities for young people, and donating to charities our team members support.

The Role

The Journeyperson – Refrigeration & Air Conditioning Systems Mechanic (313A) is responsible for the maintenance, troubleshooting, repair, and optimization of commercial, institutional, and industrial HVAC and refrigeration systems. This role ensures system reliability, performance, and client satisfaction through timely service response and quality workmanship.

Keys Tasks

The HVAC Technician’s responsibilities include, but are not limited to the following:

• Respond to service calls to diagnose and repair refrigeration and HVAC system issues.
• Perform preventative maintenance, including inspection, cleaning, lubrication, and component replacement.
• Troubleshoot electrical, mechanical, and control systems to identify causes of failure.
• Repair or replace defective components such as compressors, valves, motors, and sensors.
• Recharge refrigerants, test system pressures, and verify proper operation.
• Complete accurate service reports, work orders, and recommendations for clients.
• Communicate with clients regarding system performance, maintenance requirements, and improvement opportunities.
• Participate in on-call rotation and respond to after-hours emergency service calls as required.
• Mentor apprentices and junior technicians in troubleshooting, diagnostics, and customer service.
• Ensure compliance with refrigerant handling, environmental, and safety regulations.

Education and Experience

• Certificate of Qualification (C of Q) – 313A Refrigeration & Air Conditioning Systems Mechanic (Journeyperson).
• Gas Technician License – G1
• Minimum 5 years of experience in a service or maintenance capacity.
• Valid Ontario Class G driver’s license with insurable driving record.
• Proven experience in commercial or industrial HVAC and refrigeration systems.

Knowledge and Technical Skills

• Strong diagnostic and problem-solving skills for refrigeration and HVAC systems.
• Proficient in system charging, leak detection, electrical testing, and controls verification.
• Familiarity with modern refrigerants, environmental standards, and system efficiency optimization.
• Effective communication and client-service skills.
• Ability to work independently and manage multiple service calls.
• Commitment to safety, accuracy, and professional presentation.

Physical and Environmental Requirements

• Ability to work in varied environments, including mechanical rooms, rooftops, and outdoor settings.
• Regular bending, climbing, lifting, and manual handling of tools and equipment.
• Exposure to temperature extremes and confined spaces during repair work.
• Manual dexterity required for brazing, soldering, and handling mechanical tools and materials.
• Ability to wear personal protective equipment (PPE) for extended periods.
• Participation in rotating on-call schedule, including evenings and weekends.
• Must be able to complete tasks in a noisy environment
• Working indoors and outdoors
• Standing and walking for long periods of time
• Sitting for long periods of time
• Manual dexterity specifically typing
• Climbing stairs
• Bending, crouching, and climbing. You may be required to use ladders

We thank all applicants for their interest in working atDILFO; only thoseidentified for further consideration will be contacted.

Accommodations for disabilities are available, where needed, upon request.

DILFO uses artificial intelligence as part of the screening process.

DILFO does not accept and is not responsible for any fees related to unsolicited résumés from recruitment agencies. Recruitment agencies should not submit resumes in response to this posting toDILFOemployees or any associated company location.