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Steam Boiler Keeps Burning Out Roll Out Switch
My steam boiler “Slant Fin GXH” keeps having a fire and causing the roll out switch to burn out. The chimney has been cleaned and the boiler was recently de-carbonized. I have replaced both the roll out switch and the thermocouple. Something is causing the flame to come out within the bottom of the burner, causing the roll out switch to burn out. Could the gas pressure be adjusted? Perhaps it is too high? Appreciate the help in advance...