Oklahoma Service Technician Practice Exam

A technician can determine if a compressor is faulty by performing electrical tests and checking for unusual noises. This approach provides a comprehensive assessment of the compressor’s operational health. Electrical tests can reveal issues related to electrical components, such as short circuits or open circuits, which may cause the compressor to malfunction. Additionally, unusual noises, such as grinding or rattling, may indicate internal problems like worn bearings or damaged components, which can be critical indicators of compressor failure.

While inspecting the exterior for damage can provide some initial insight, it does not thoroughly evaluate the internal workings or electrical components of the compressor. Checking refrigerant levels is also important for diagnosing system issues but does not directly test the compressor's functionality. Simply replacing the compressor without a proper diagnosis would waste resources and might not solve the underlying issue if it is related to another component in the system. Therefore, conducting electrical tests and listening for noises is the most effective method for diagnosing a faulty compressor.