my vaillant boiler is saying a code com on it ?
What does f.25 mean?
Water dripping from opening at top of pump?
Vaillant ecotec plus 630?
my boiler will no work?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
No hot water, intermittent when air temp drops?
Boiler over pressure on the hot-water side?
no heating water?
Vaillant ecotec 831 plus?
how do I rectify the fault as detailed below?
Vaillant vcw gb242 eh central heating problem?
Vaillant Thermocompact Fault?
Vaillant ecomax 828/2 e water pressure sensor?
Hot water comes and goes!?