Main Hall Effect Sensor (5114767 / 5114710) Ensure your boiler accurately detects water flow with this essential Main Hall Effect Sensor. This critical component monitors when a hot water tap is turned on, sending a magnetic signal to the boiler's control board to trigger the ignition sequence. If your central heating works but your hot water does not activate when the tap is opened, this sensor is often the primary cause. Accurate Flow Detection: Utilizes high-precision magnetic sensing to detect the movement of the internal turbine, providing instant feedback for domestic hot water demands. Essential Diagnostic Part: A faulty sensor prevents the boiler from recognizing flow, which is a common failure point for boilers that show no activity when hot water is requested. Direct Replacement: Engineered to replace part numbers 5114767 and 5114710, ensuring a perfect fit and electrical compatibility. Robust Design: Built to withstand the constant vibration and hydraulic pressure within the boiler's hydraulic block. Compatible Models: Main 25 Eco Elite (Pre & Post Serial Number MMH 1512) — 47-467-08 Main 30 Eco Elite (Pre & Post Serial Number MMH 1512) — 47-467-09 Main 25 Combi ERP (Serial No Ending AC, BC, CC, DC, EC) — 47-467-12 Main 30 Combi ERP (Serial No Ending AC, BC, CC, DC) — 47-467-13 Main 28 System ERP Main 24 System Eco Elite Main Combi 25 Eco Elite Main Combi 30 Eco Elite
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