how do I rectify the fault as detailed below?
Vaillant Ecotech Plus 831 F22 fault?
Valiant thermostat , BMU-Err ?
Vaillant condensing boiler ecoTEC plus?
Vailliant turbo max plus 824e?
Vaillant Thermocompact Fault?
Vaillant vcw gb242 eh central heating problem?
Vaillant igniting issue ( domestic ) not CH?
my vaillant boiler is saying a code com on it ?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant ecotec 831 plus?
no heating water?
how to fix water pressure its down at bottom of grey part?
Vaillant F22 fault?
Problem with the pressure in combi boiler?