my vaillant boiler is saying a code com on it ?
Valiant thermostat , BMU-Err ?
vaillant ecoTEC plus boiler fault code - how to fix?
how do I vent the heat exchanger?
Vaillant condensing boiler ecoTEC plus?
Vaillant eco plus 531 boiler?
Hot water comes and goes!?
Vaillant vcw gb242 eh central heating problem?
Vailliant turbo max plus 824e?
No hot water, intermittent when air temp drops?
Vaillant Thermocompact Fault?
Vaillant 828E - no hot water?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
my boiler will no work?
Vaillant ecotec 831 plus?