my vaillant boiler is saying a code com on it ?
How many factors causes f22 fault?
how do I rectify the fault as detailed below?
Water dripping from opening at top of pump?
No hot water, intermittent when air temp drops?
Vaillant 630 error f 85?
my boiler will no work?
no heating water?
how to fix water pressure its down at bottom of grey part?
Vaillant Thermocompact Fault?
Vaillant ecotec plus 630?
Vaillant igniting issue ( domestic ) not CH?