how do I rectify the fault as detailed below?
Vaillant 630 error f 85?
Vaillant 828E - no hot water?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
no heating water?
Vaillant ecomax 828/2 e water pressure sensor?
Vaillant igniting issue ( domestic ) not CH?
Vaillant Thermocompact Fault?
Valiant thermostat , BMU-Err ?
Vaillant vcw gb242 eh central heating problem?
No hot water, intermittent when air temp drops?
Vaillant F22 fault?
how to fix water pressure its down at bottom of grey part?
my boiler will no work?
Hot water comes and goes!?