Air Conditioning Mechanic (2 positions)

  • Dufferin-Peel Catholic District School Board
  • Mississauga, ON, Canada
  • Oct 22, 2021
Full-Time Maintenance and Facilities

Job Description

The Dufferin-Peel Catholic District School Board is a dynamic board committed to the delivery of quality educational programs and services.  The Board is comprised of over 81,000 students enrolled in 151 facilities (125 elementary and 26 secondary schools) throughout the municipalities of Mississauga, Brampton, Caledon and Orangeville.  We have approximately 11,000 employees in an increasingly diverse community.  Dufferin-Peel Catholic District School Board is one of Ontario’s largest school boards, encompassing both urban and rural areas.  We are currently accepting applications for the following:

Air Conditioning Mechanic
2 positions

Position Type:
Permanent, Full-Time


Interested applicants can submit an up to date resume, proof of education and trade certification via email to:

All new employees will be required to submit a current original criminal background check (CBC) including a “Vulnerable Sector Screening” (VSS) issued within 6 months prior to commencing employment with the Board.

Visit for more details.

We thank all applicants, but advise that only those under consideration will be contacted.

If you require a disability related accommodation in order to participate in the recruitment process, please contact us at (905) 890-0708, extension 24272 to provide your contact information. Support Services staff will contact you within 2 business days. The Dufferin-Peel Catholic District School Board is an equal opportunity employer. We will accommodate your needs under the Ontario Human Rights Code.

We actively encourage applications from members of groups with historical and/or current barriers to equity, including, but not limited to:

  • First Nations, Métis and Inuit peoples, and all other Indigenous peoples;
  • members of groups that commonly experience discrimination due to race, ancestry, colour or place of origin;
  • persons with visible and/or invisible (physical and/or mental) disabilities.

Full Job Description Below:

Air Conditioning Mechanic – Job Description

Position Summary

Under the direction of the Supervisor, Maintenance Services, the Air Conditioning/Refrigeration Mechanic is responsible for the installation, repair, operation and preventive maintenance of heating, ventilating and air conditioning equipment and for all associated controls.

Major Functions and Responsibilities

  • Performs the daily repair and adjustment of heating, ventilating and air conditioning equipment.
  • Systematically diagnoses malfunctions in HVAC equipment and systems and carries out necessary and appropriate repairs and/or adjusts system to minimize system down time and ensure continued comfort of staff and students.
  • Replaces defective or worn system components to maximize economy of operation.
  • Replaces refrigeration compressors, piping and associated equipment, system leak testing evacuation and charging.
  • Tests refrigerants and systems for contamination.
  • Disassembles, inspects, overhauls and re-assembles reciprocating and rotary compressors.
  • Tests, services and repairs the motor control devices connected to the building environmental control equipment.
  • Replaces or repairs defective heating equipment and sets up and performs combustion efficiency tests.
  • Performs seasonal start up and close down operations.
  • Records details of repairs made or modifications undertaken.
  • Installs and upgrades HVAC equipment, ductwork, and all associated equipment making necessary field modifications and service configurations, to accommodate new equipment.
  • Installs new HVAC systems including ductwork diffusers, refrigeration pipe work and all associated components.
  • Extends existing system to new building zones and re-balances the air and/or liquid circuits to suit revised parameters.
  • Records all work performed on as-built drawings and catalogues preventive maintenance procedures.
  • Conducts HVAC system preventive maintenance to ensure maximum economy of operation, prevent unnecessary breakdown of equipment, and isolate potential system problems.
  • Cleans heat transfer surfaces and strainers, and checks for corrosion wear and other defects.
  • Checks refrigeration and oil levels, system operating pressures and temperatures and adjusts to recommended performance levels.
  • Checks operation of chemical treatment and lubricates and adjusts as necessary.
  • Opens, cleans and inspects heating equipment including hydronic boilers, pumps and motors.
  • Cleans, lubricates, adjusts and replaces system components including bearings, belts, filters, regulators, vibration eliminators, control equipment and accessories.
  • Supports the Building Operators by providing the Building Operators with advice and skills as needed.
  • Tests, services, and repairs hydronic pumps and motors.
  • Checks and balances hydronic and air systems to design requirements.
  • Checks and reports equipment not conforming to current safety recommendations or regulations.
  • Performs general repairs on all other related areas not specified above.
  • Provides input to the Plant Department for the development and continued updating of the preventive maintenance programs for all Board facilities.
  • Advises the Supervisor, Maintenance Services of the need for changes to operational procedures and policies to make the system run more smoothly.
  • Responsible for the daily maintenance and upkeep of the assigned Board vehicle and ensures the vehicle is kept clean, as well as advises the Supervisor of any mechanical deficiencies.
  • Performs other duties as assigned by the Supervisor, Maintenance Services.

Qualifications, Education, Experience, and Knowledge

  • Valid Refrigeration, Air Conditioning mechanics license issued by the Ontario Ministry of Education & Training or an equivalent Canadian inter-provincial license.
  • Valid Ozone Depletion Prevention Certificate.
  • Valid G1 gas fitters license issued by the Ontario Ministry of Skills Development or an equivalent Canadian inter-provincial license.
  • Valid Ontario driver’s license.
  • Minimum grade 12 secondary school education or equivalent combination of education and experience.
  • Minimum of five years’ experience in diagnostic evaluation, maintenance, installation, set up and commissioning of commercial air conditioning and refrigeration systems.
  • Good working knowledge of the latest developments in air conditioning technology.
  • Good working knowledge of building service systems.
  • Ability to read mechanical and electrical construction, schematic and control drawings.
  • Good working knowledge of Direct Digital Control interface systems.
  • Good working knowledge of electrical control systems, operating procedures, relevant codes and safety practices.
  • Knowledge of the “Occupational Health and Safety Act”.
  • Good oral and written communication in English.

Impact of Errors

  • Incorrect actions could result in significant loss of time and resources and could impact on the health and safety of others
  • Incorrect use of tools and equipment could impact on the health and safety of others


  • Directs the activities of any assigned maintenance personnel.