The invention relates to a heat exchanger system, in particular for connection to an internal combustion engine, preferably of a motor vehicle, comprising at least one heat exchanger module, in particular oil-water heat exchanger module (10), and a layer heating module (11), which is mounted or mountable on the heat exchanger module, wherein the layer heating module (11) comprises a substrate, in particular a carrier plate (12), and an electric heating coating (13) applied to the substrate, in particular to the carrier plate (12).