If the main burner does not achieve a full flame when using a hydraulic safety valve, what should be your first action?

The first action when the main burner does not achieve a full flame while using a hydraulic safety valve should be ensuring the sensor tip is bright cherry red. This is essential because the sensor tip's temperature is indicative of its ability to detect or sense the presence of the flame properly.

A bright cherry red sensor tip shows that the thermocouple or flame sensor is functioning correctly and is adequately heated by the flame. If the sensor is not heated enough (which would be indicated by a dull or uncolored appearance), it may cause the safety valve to shut off the gas supply to the burner, preventing a full flame from ignition. Consequently, checking the sensor's condition is a critical initial step to resolve issues with the burner flame.

Addressing pilot flame quality, the gas supply line, or replacing the burner are crucial steps but should come after confirming the sensor's condition since they may not directly relate to the immediate issue of flame achievement.