my vaillant boiler is saying a code com on it ?
Vaillant vcw gb242 eh central heating problem?
how do I rectify the fault as detailed below?
Hot water comes and goes!?
Boiler over pressure on the hot-water side?
No hot water, intermittent when air temp drops?
Vaillant ecomax 828/2 e water pressure sensor?
Vaillant Thermocompact Fault?
How many factors causes f22 fault?
resetting thermostatat?
no heating water?
how to fix water pressure its down at bottom of grey part?