NATE Air Conditioning and Heat Pumps Practice Exam 2025 – All-in-One Guide to Master Your Certification!

Question: 1 / 400

What critical first step must be taken to begin the troubleshooting process?

Check all fuses for continuity

Check for grounded motor windings

Check relay and contactor housings for stuck switches

Check that the correct voltage is being supplied to the equipment

The initial step in the troubleshooting process when working with air conditioning and heating systems is to verify that the equipment is receiving the correct voltage. This is essential because many electrical and mechanical components rely on a specific voltage to function properly. If the voltage is too low or too high, it can result in poor performance, malfunctions, or even damage to the system.

By confirming the correct voltage supply, technicians can rule out power issues that may be causing operational problems. Once the voltage is checked and deemed to be correct, the technician can proceed with other troubleshooting steps, such as examining components like fuses, motors, and relays, with a clearer understanding of the system’s operational baseline. Ensuring that the equipment is correctly powered helps narrow down the search for the root cause of any issues more effectively.

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