how do I rectify the fault as detailed below?
Vaillant condensing boiler ecoTEC plus?
my boiler will no work?
Vaillant igniting issue ( domestic ) not CH?
Vaillant Thermocompact Fault?
Vaillant ecomax 828/2 e water pressure sensor?
Vaillant vcw gb242 eh central heating problem?
Vaillant 828E - no hot water?
Vaillant ecotec 831 plus?
Boiler over pressure on the hot-water side?
Vaillant eco plus 531 boiler?
Vaillant Ecotech Plus 831 F22 fault?
my vaillant boiler is saying a code com on it ?
Problem with the pressure in combi boiler?
how to fix water pressure its down at bottom of grey part?