Temperature determination through a transmitter and on the controller board integrated temperature sensor

Heating device, especially a water heating device (20) of a motor vehicle in the form of an auxiliary heater has a housing mantle (1) and heat exchanger (2) as well as an electronic control unit (11) for regulating heating using a temperature sensor (3). A heat conductor (10) is arranged near to the circuit board of the controller to transmit the temperature through the housing mantle to the temperature sensor connected to the circuit board.