Eberspacher or Webasto Water Heater On Off Push Switch Kit This push switch kit is designed for use with diesel and petrol water heaters, including systems such as Eberspacher Hydronic and Webasto Thermo Top units. Featuring a simple on/off function, the switch provides a straightforward method of controlling heater operation via an S+ signal connection. The kit includes a 4-pin configuration, making it suitable for integration into compatible heater control circuits. Features: Compatible with Eberspacher Hydronic and Webasto Thermo Top Suitable for 12V and 24V systems S+ signal control 4-pin configuration This product is an ideal solution for simple on off control of diesel and petrol water heaters in vehicle and auxiliary heating system installations.