ACR 0850C - Commercial Troubleshooting Add to Personal Catalog ACR 0850C - Commercial Troubleshooting Clock Hours: 180 Occupational Domestic refrigeration and commercial circuitry, principles of control and interaction of components and defrost systems. Students will design; build and troubleshoot commercial systems. Lab Fee: 40 Click here for the Summer 2026 Class Schedule Click here for the Fall 2026 Class Schedule