how do I rectify the fault as detailed below?
how to fix water pressure its down at bottom of grey part?
Vaillant Thermocompact Fault?
No hot water, intermittent when air temp drops?
Vaillant ecotec plus 630?
my vaillant boiler is saying a code com on it ?
Water dripping from opening at top of pump?
Vaillant condensing boiler ecoTEC plus?
Valiant thermostat , BMU-Err ?
How many factors causes f22 fault?
resetting thermostatat?
Vaillant vcw gb242 eh central heating problem?