can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant igniting issue ( domestic ) not CH?
Vaillant ecotec 831 plus?
my vaillant boiler is saying a code com on it ?
Valiant thermostat , BMU-Err ?
how to fix water pressure its down at bottom of grey part?
Vaillant vcw gb242 eh central heating problem?
Hot water comes and goes!?
Problem with the pressure in combi boiler?
Vaillant Ecotech Plus 831 F22 fault?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
Advice?