my vaillant boiler is saying a code com on it ?
Vaillant Ecotech Plus 831 F22 fault?
Vaillant ecotec 937?
Vaillant eco plus 531 boiler?
Vaillant condensing boiler ecoTEC plus?
Water dripping from opening at top of pump?
my boiler will no work?
Vaillant F22 fault?
how to fix water pressure its down at bottom of grey part?
no heating water?
Vaillant vcw gb242 eh central heating problem?
how do I rectify the fault as detailed below?