my vaillant boiler is saying a code com on it ?
how do I rectify the fault as detailed below?
Hot water comes and goes!?
Vaillant Ecotech Plus 831 F22 fault?
how to fix water pressure its down at bottom of grey part?
Vaillant igniting issue ( domestic ) not CH?
Vaillant condensing boiler ecoTEC plus?
Vaillant ecomax 828/2 e water pressure sensor?
Vaillant F22 fault?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
How many factors causes f22 fault?
Vaillant vcw gb242 eh central heating problem?