What Are the Major Causes of Flame Rollout in Gas Boilers?

Flame rollout occurs when burner flames exude from the normal combustion area of a gas boiler or furnace. Like furnaces, gas boilers incorporate a heat exchanger that accepts hot combustion gases produced by the burner, then transfers heat to the water. In proper operation, all combustion should be limited to the combustion chamber. Venting Issues In most cases, the sequence of events that …