Which of the following are the first two checks typically made on an electronic control?

The first two checks made on an electronic control typically focus on the presence of proper input signals and proper output voltages. This is crucial because the electronic control system relies on accurate input signals to function correctly. Input signals come from various sensors that provide information about the system's operational status. If these signals are correct, it indicates that the control system is receiving the necessary data to calculate outputs effectively.

After confirming the input signals, the next step is to ensure that the output voltages are within the expected range. This verification is essential because the control board often sends signals to actuators, relays, or other components. If the output voltages are inadequate or nonexistent, the entire system can malfunction, leading to performance issues or system failure.

By starting the troubleshooting process with these two checks, technicians can quickly ascertain if the control is operating correctly at a basic level, which is foundational for any further diagnostics. This approach prioritizes the verification of essential functionalities that support the operation of HVAC systems.