Vaillant vcw gb242 eh central heating problem?
Vaillant 828E - no hot water?
Boiler over pressure on the hot-water side?
resetting thermostatat?
Water dripping from opening at top of pump?
Vaillant igniting issue ( domestic ) not CH?
how do I rectify the fault as detailed below?
Valiant thermostat , BMU-Err ?
my vaillant boiler is saying a code com on it ?