my vaillant boiler is saying a code com on it ?
No hot water, intermittent when air temp drops?
Vaillant F22 fault?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Vaillant ecomax 828/2 e water pressure sensor?
how to fix water pressure its down at bottom of grey part?
Why is heating on at night?
Vaillant Thermocompact Fault?
Water dripping from opening at top of pump?
how do I rectify the fault as detailed below?
Vaillant vcw gb242 eh central heating problem?
resetting thermostatat?