how do I rectify the fault as detailed below?
my vaillant boiler is saying a code com on it ?
my boiler will no work?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Why is heating on at night?
Valliant Eco tec 28?
vaillant ecoTEC plus boiler fault code - how to fix?
how to fix water pressure its down at bottom of grey part?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vailliant turbo max plus 824e?
Vaillant eco plus 531 boiler?
Vaillant vcw gb242 eh central heating problem?
Hot water comes and goes!?
Vaillant ecomax 828/2 e water pressure sensor?
how do I vent the heat exchanger?