Relay board De Dietrich 711500700

The relay board is an electronic control module that manages various functions in a boiler or burner system, such as switching pumps, fans, or valves based on signals from the thermostat or sensors. This board acts as an intermediary between low-voltage controls and high-power components, ensuring reliable operation. A faulty relay board can cause erratic behavior, failure to start, or safety lockouts. Replacing it with a compatible unit can restore proper system functionality. When selecting a relay board, confirm its input voltage, relay ratings, and connector types to match your heating equipment's specifications.