MD Master Restricted Refrigeration Certification Exam

MD Master Restricted Refrigeration Refrigeration technicians holding this credential service everything from walk-in coolers at restaurants to industrial blast freezers, diagnosing leaks and replacing compressors on daily calls. You’ll troubleshoot pressure abnormalities, perform routine maintenance on expansion devices, and interpret pressure-enthalpy diagrams to solve real failures. The restricted designation means you can handle specific refrigerant types safely without universal certification overhead.