can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant ecotec 831 plus?
Hot water comes and goes!?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
Vaillant Thermocompact Fault?
Vaillant igniting issue ( domestic ) not CH?
No hot water, intermittent when air temp drops?
vaillant ecoTEC plus boiler fault code - how to fix?
Vaillant vcw gb242 eh central heating problem?
my vaillant boiler is saying a code com on it ?
Why is heating on at night?
how do I rectify the fault as detailed below?