can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
my boiler will no work?
vaillant ecoTEC plus boiler fault code - how to fix?
my vaillant boiler is saying a code com on it ?
Vaillant Ecotech Plus 831 F22 fault?
how do I rectify the fault as detailed below?
No hot water, intermittent when air temp drops?
Vaillant igniting issue ( domestic ) not CH?