How many factors causes f22 fault?
Hot water comes and goes!?
my vaillant boiler is saying a code com on it ?
Vaillant igniting issue ( domestic ) not CH?
Vaillant vcw gb242 eh central heating problem?
Why is heating on at night?
no heating water?
vaillant ecoTEC plus boiler fault code - how to fix?
how do I rectify the fault as detailed below?