To obtain a sense of security that a heat source device normally operates by enabling a user to recognize that the user has performed a correct operation for operation of the heat source device.

Remote controllers 1, 2 installed at distant places are connected to the heat source device such as a water heater 27 through the use of signals. Each of the remote controllers 1, 2 includes an operation sound transmitting means 40 for generating a pseudo sound for an operation sound generated in response to an operation of the heat source device at the timing of the above operation. For instance, in the heat source device, the operation sound transmitting means 40 transmits a pseudo sound for a noise of ignition to a fuel supplied to a burning means as sound such as "Bo" and transmits a pseudo sound for a burning sound of the burning means as sound such as "Go" in a heating part for heating liquid.