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The electrode sparks but no flame, after many resets, still no. It started off as an intermittent issue which only seemed to affect the central heating, where it read more vaillant ecotec plus 831 con fault. Vaillant ecotec plus 837 exploded views and parts list. The ecotec plus combination boiler consists of 3 models with outputs of 23 kw, 31 kw and 37 kw for domestic hot water and two pro versions with outputs of 24 kw and 28 kw for domestic hot water. View online or download vaillant 837 e instructions for installation manual. The electrode sparks but no flame, after many resets, still no joy. Vaillant ecotec 937 plus f81f91 fault code vaillant boiler. Im at my wits end as to what has gone wrong and how to. Vaillant ecotec plus 430 boiler download instruction manual pdf. The boiler will operate automatically to provide domestic hot water.
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