vaillant ecoTEC plus boiler fault code - how to fix?
Vaillant Thermocompact Fault?
my vaillant boiler is saying a code com on it ?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
What does f.25 mean?
Problem with the pressure in combi boiler?
Vaillant vcw gb242 eh central heating problem?
Vaillant ecotec 831 plus?
Vaillant 828E - no hot water?
No hot water, intermittent when air temp drops?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
how do I rectify the fault as detailed below?