What is a common failure signal for an oil burner?

A blinking red light on the burner control serves as a common failure signal for an oil burner. This visual indicator is designed to alert the technician or user that there is an issue with the burner, such as a fault in ignition, a failure to detect flame, or other operational problems. These signals are part of the safety features integrated into modern oil burner systems, ensuring that they can inform users promptly when the system is not functioning correctly.

The blinking light usually corresponds to specific error codes that can help diagnose the problem and assist in troubleshooting. This allows for a more efficient repair process, as technicians can refer to documentation associated with those codes to determine the necessary corrective actions.

In contrast, while other options may indicate issues, they are not universally recognized as standard failure signals across all systems. Continuous buzzing and high-pitched whistles could suggest separate anomalies like electrical issues or airflow problems but are not standardized alerts like the blinking light. Smoke can indicate a serious combustion problem, but it's more of a symptom of a failure than a signal explicitly designed to alert users to malfunctions.