We may have found other answers which could help you.
Click here for Gb Vaillant IgnitionVaillant eco plus 531 boiler?
Vaillant 828E - no hot water?
vaillant ecoTEC plus boiler fault code - how to fix?
Vaillant vcw gb242 eh central heating problem?
Vaillant condensing boiler ecoTEC plus?
Vaillant ecotec 831 plus?