can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant vcw gb242 eh central heating problem?
Boiler over pressure on the hot-water side?
how do I rectify the fault as detailed below?
Advice?
my vaillant boiler is saying a code com on it ?
Vaillant condensing boiler ecoTEC plus?
vaillant ecoTEC plus boiler fault code - how to fix?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Vaillant igniting issue ( domestic ) not CH?
Why is heating on at night?
Vaillant eco plus 531 boiler?
No hot water, intermittent when air temp drops?
Problem with the pressure in combi boiler?
Vaillant Ecotech Plus 831 F22 fault?