When the main burner ignites, what can cause the pilot to go out?

When the main burner ignites, a malfunction in the pressure regulator vent can indeed lead to the pilot going out. The pressure regulator is responsible for maintaining the appropriate gas pressure to the pilot and burner systems. If the vent of the pressure regulator becomes blocked or fails to function properly, it can affect the gas pressure delivered to the pilot. This may cause instability in the flame, potentially blowing it out when the main burner is ignited, due to sudden changes in pressure or flow of gas.

A healthy pressure regulator is crucial as it ensures that the ratio of air to fuel remains balanced during operation. If this balance is disrupted due to pressure fluctuations, it can create conditions that extinguish the pilot flame.

Understanding this mechanism is essential for recognizing the importance of regular maintenance and inspection of pressure regulators in gas appliances, to ensure safe and efficient operation.