As a refrigeration mechanic, you install and maintain refrigeration systems for residential or commercial properties, such as homes, restaurants, or cold storage facilities. When installing new systems, you consult with customers or facilities managers to determine the scope of installation, budgets, and timetables for completion. Your duties during maintenance work may include performing scheduled checks, cleaning cooling systems, or replacing defective parts or materials, such as refrigerant coolant. You may work at a refrigeration company or as part of a larger construction or HVAC business.