Flame lift-off in oil fired pressure jet burners is an unwanted condition in which the flame and burner become separated. This condition is most commonly created by excessive combustion air and often results in the loss of flame as the photo-electric cell fails to register the light of the flame, this in turn results in a safety lockout of the control box. Flame lift-off in oil fired pressure jet burners is an unwanted condition in which the flame and burner become separated. This condition is most commonly created by excessive combustion air and often results in the loss of flame as the photo-electric cell fails to register the light of the flame, this in turn results in a safety lockout of the control box.