can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant Thermocompact Fault?
No hot water, intermittent when air temp drops?
vaillant ecoTEC plus boiler fault code - how to fix?
Valiant thermostat , BMU-Err ?
Vaillant condensing boiler ecoTEC plus?
how do I vent the heat exchanger?
Vaillant vcw gb242 eh central heating problem?
Problem with the pressure in combi boiler?
how to fix water pressure its down at bottom of grey part?
how do I rectify the fault as detailed below?
Advice?