What is the first step to take on an emergency midnight no-heat call if the burner runs after pressing the reset button?

When addressing a midnight no-heat emergency call, the primary consideration is to establish the functioning status of the heating system. If pressing the reset button causes the burner to run, this indicates that the ignition system functions correctly, and the burner is capable of operating.

The next logical step is to conduct a normal testing routine to determine any underlying issues that may still affect heating performance. This routine typically includes checking system pressures, temperatures, and operational efficiency to identify potential problems that could cause heating failure.

Engaging in this systematic testing allows for the identification and troubleshooting of other issues, such as airflow restrictions, blocked flues, or malfunctioning thermostats. It establishes a clearer understanding of the heater's operational status, leading to more effective diagnosis and resolution.

Checking the fuel supply might be necessary, but this step usually comes before determining if the burner runs. Inspecting the burner for faults and calling for backup support could be valid approaches but are often part of or follow the testing routine rather than the immediate next step when the burner operates after being reset.