can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant Ecotech Plus 831 F22 fault?
vaillant ecoTEC plus boiler fault code - how to fix?
Vaillant condensing boiler ecoTEC plus?
Problem with the pressure in combi boiler?
Why is heating on at night?
how to fix water pressure its down at bottom of grey part?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Valiant thermostat , BMU-Err ?
my vaillant boiler is saying a code com on it ?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
my boiler will no work?
Vaillant 828E - no hot water?
No hot water, intermittent when air temp drops?
Vaillant Thermocompact Fault?
Valliant Eco tec 28?
how do I vent the heat exchanger?
how do I rectify the fault as detailed below?