This Radiator Fan Switch, part number XEFS79 from Ci Ignition, is a temperature-activated switch designed for radiator fans. It features a 3-pin connector and a spanner size of 29. The switch operates within a temperature range of 83°C (on) to 92°C (off). This part replaces XEFS38 and is compatible with various cross-references and OEM references, including those from Citroën/Peugeot (126417, 95495385, 95495388, 95576325, 956126).