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This group performs some or all of the following duties:

• Read and interpret blueprints, drawings or other specifications
• Measure and lay out reference points for installation
• Assemble and install refrigeration or air conditioning components such as motors, controls, gauges, valves, circulating pumps, condensers, humidifiers, evaporators and compressors using hand and power tools
• Measure and cut piping, and connect piping using welding and brazing equipment
• Install, troubleshoot and overhaul entire heating, ventilation, air handling, refrigeration and air conditioning systems
• Start up system and test for leaks using testing devices
• Recharge system with refrigerant, check and test regulators, calibrate system and perform routine maintenance or servicing
• Repair and replace parts and components for entire refrigeration, air conditioning, ventilation or heat pump systems
• May install, maintain and repair equipment in refrigerated trucks used to transport food or medical supplies
• May prepare work estimates for clients.

• Completion of secondary school and training courses or a vocational program is usually required.
• Completion of a three- to five-year apprenticeship program or a combination of over five years of work experience and industry courses in refrigeration and air conditioning repair is usually required to be eligible for trade certification.
• Trade certification for refrigeration and air conditioning mechanics is compulsory in Nova Scotia, New Brunswick, Quebec, Ontario, Manitoba, Saskatchewan and Alberta and available, but voluntary, in all other provinces and the territories.
• Trade certification for transport refrigeration mechanics is available, but voluntary, in New Brunswick and Alberta.
• Red Seal endorsement is also available to qualified refrigeration and air conditioning mechanics upon successful completion of the interprovincial Red Seal examination.

• Progression to supervisory positions is possible with experience.
• The Red Seal endorsement allows for interprovincial mobility.

• Domestic refrigerator or window air conditioner servicers and repairers (in 7332 Appliance servicers and repairers)
• Supervisors of refrigeration and air conditioning mechanics (in 7301 Contractors and supervisors, mechanic trades)