Abstract: A coffee maker comprises a housing and a water tank supported by the housing. Included are a filter device and a flow heater having a heating element for heating water from the water tank and feeding the same to the filter device, the flow heater being positioned within the housing. A thermal cut-out is associated with the flow heater, and an on/off indicator lamp is situated adjacent the thermal cut-out. Provision is made for actuating the thermal cut-out and includes an actuator button having an opening and an actuating arm made of a transparent material and serving as a light guide when the indicator lamp is on, one end of the actuating arm being located near the indicator lamp and the other end of the actuating arm projecting through the opening in the actuator button.