Process of Elimination: Cut Your Possibilities in Half
In this instructional monologue, the speaker introduces a systematic troubleshooting method for HVAC technicians called the Process of Elimination. The approach emphasizes asking a specific sequence of binary questions—starting with power to the unit, then whether there is a call for cooling, and finally whether the outdoor unit is running—to quickly rule out upstream issues. Once upstream functionality is confirmed, the focus shifts to the outdoor unit’s key components (contactor power, the contactor itself, capacitor, compressor, and fan motor). Each affirmative or negative answer halves the set of possible faults, allowing the technician to isolate the problem efficiently without guessing. The speaker stresses that effective troubleshooting is about asking the right questions in the right order, not about knowing every possible fault in advance, and encourages the listener to share this method with others.
