Product information:

Temperature Sensitive Relay for 12/24V AUTOTERM combiboil & duoboil boilers.

Smart, programmable relay that automatically activates your heating rod below 55°C and shuts off above 65°C.

Features an optional Winter Mode for anti-freeze protection (on < 3°C, off > 7°C), manual override, LED status indicator, and a durable glass fiber-reinforced nylon enclosure.