Heating device

The heater has a radiator accommodated in a housing and comprising two contact plates (28, 30), and a disk-shaped heating element e.g. positive temperature coefficient resistor element (32), arranged between the contact plates. The radiator is fixed at the housing by a fixing element (34), and pushes the contact plates. The fixing element has abutment shoulders, and a packet made of the contact plates. The heating element is fixed at a position between the shoulders. A connection section (40) of the fixing element is extended over the packet and inserted into a support of the housing.