A method and system used to make a fuel tank inert that includes a chiller assembly coupled in flow communication with a vehicle fuel tank, and a system controller assembly operatively coupled to the chiller assembly. More specifically, the chiller assembly includes a pump configured to extract a quantity of a fluid from the vehicle fuel tank, and an evaporator configured to receive a flow of the extracted quantity of fluid from the pump and further configured to reduce a temperature of the fluid. The chiller assembly also includes a chiller controller configured to activate and deactivate the pump. The system controller assembly is operatively coupled to chiller controller, wherein the system controller assembly is configured to transmit to the chiller controller one of a start signal to start chiller operations or a stop signal to stop chiller operations.