Problem with the pressure in combi boiler?
Vaillant 828E - no hot water?
Valiant thermostat , BMU-Err ?
Vaillant igniting issue ( domestic ) not CH?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant ecomax 828/2 e water pressure sensor?
Vaillant Thermocompact Fault?
Boiler over pressure on the hot-water side?
vaillant ecoTEC plus boiler fault code - how to fix?
how to fix water pressure its down at bottom of grey part?
Vaillant ecotec plus 630?
Vaillant eco plus 531 boiler?
No hot water, intermittent when air temp drops?
my boiler will no work?
Vaillant condensing boiler ecoTEC plus?
Vaillant vcw gb242 eh central heating problem?
my vaillant boiler is saying a code com on it ?
Why is heating on at night?
Vaillant ecotec 831 plus?
how do I vent the heat exchanger?
how do I rectify the fault as detailed below?