NATE Gas & Oil Forced-Air and Hot-Water Heating Systems Practice Test 2025 - Free NATE Practice Questions and Study Guide

If the burners light but subsequently shut down, the most likely problem is located in the control module. The control module is responsible for regulating the operation of the heating system, including the timing and sequence of the burner's ignition. It ensures that the burners operate within designated thresholds for safety and efficiency, managing inputs from various safety devices and sensors.

When burners ignite and then shut down, it can indicate that the control module is interpreting signals that lead to unsafe conditions or malfunctions, such as issues with monitoring the flame's presence or detecting safety concerns like pressure or temperature anomalies. Therefore, if the control module is malfunctioning, it may prematurely shut off the burners even if they initially ignite correctly, leading to the observed behavior of burners lighting and then shutting down shortly after.

Other components, such as the gas line, thermostat, or pilot assembly, may also contribute to heating system issues, but their roles do not directly govern the operational logic that would cause burners to light and then turn off due to control sequences.