my vaillant boiler is saying a code com on it ?
Vaillant igniting issue ( domestic ) not CH?
Water dripping from opening at top of pump?
Valiant thermostat , BMU-Err ?
No hot water, intermittent when air temp drops?
Vaillant 630 error f 85?
How many factors causes f22 fault?
Hot water comes and goes!?
Vaillant condensing boiler ecoTEC plus?