A professional who replaces defective components and reassembles refrigeration units to work orders and blueprint specifications. Responsibilities include:

• Studies rejection slips from inspection department or customer's letters and observes functioning of components, such as controls, fan, condenser, evaporator, or compressor to determine need for repair or replacement.
• Drains oil and pumps gas from unit.
• Loosens bolts, and melts soldered or brazed seams, to dismantle unit, using handtools and torch.
• Removes and replaces defective components.
• Brazes or solders parts to repair defective joints and leaks.
• Reassembles unit, using measuring instruments, handtools, soldering iron, and hand torch.
• Routes defective components to salvage department.
• May adjust unit controls.
• Records cause of malfunction, repairs, and replacements made.