Abstract: The control system includes a controller and a clocking circuit along with a computer for each one of the coke oven chambers. A first control signal is responsive to the occurrence of charging coal into a given oven chamber and starts the clock. A second control signal is responsive to the pushing of coke from the oven chamber and stops the clock. When the duration of the coking time for a given oven chamber exceeds a predetermined coking time, the controller provides a signal for operating valves to terminate the flow of combustion gases into heating flues at the sides of that coke oven chamber. In the system, the computer updates coking time and establishes from time-to-time from data fed to it, the thermal state of each heating flue in the battery.