CONTROL STRUCTURE OF HEATER

PROBLEM TO BE SOLVED: To prevent a burner from being extinguished due to shortage of fuel while burning is continued, in a heater in which burning is continued for predetermined time after the burning is started with a timer means. SOLUTION: A fuel pump 5 that is controlled by a flow control means 6 is arranged to a fuel feeding pipe that connects an oil tank and a burner 2 with each other, a burner controller 9 that drives a combustion fan 7 that supplies combustion air to the burner 2 and the flow control means 6 of a fuel pump 5 is provided and the burner 2 of which burning is started by the burner controller 9 continues the burning for the predetermined time with the timer means 12. A flow calculating means 14 that is activated when a flow sensor 10, that detects the quantity of oil inside the oil tank, detects the predetermined quantity of remaining fuel is provided, an operating time detecting means 13 that detects running time until the extinguishing of the burning with the timer means 12 acts as an input to the flow calculating means 14 and the flow calculating means 14 calculates the maximum flow to continue the burning of the burner 2 for the remaining time when the fuel quantity sensor 10 detect the predetermined quantity of the remaining fuel and replaces the maximum quantity of flow of the flow control means 6 with the calculated value.