how do I rectify the fault as detailed below?
Boiler over pressure on the hot-water side?
Water dripping from opening at top of pump?
Vaillant ecomax 828/2 e water pressure sensor?
How many factors causes f22 fault?
Vaillant igniting issue ( domestic ) not CH?
vaillant ecoTEC plus boiler fault code - how to fix?
Valiant thermostat , BMU-Err ?
Hot water comes and goes!?