my vaillant boiler is saying a code com on it ?
how do I rectify the fault as detailed below?
Vaillant vcw gb242 eh central heating problem?
Vaillant condensing boiler ecoTEC plus?
Vaillant eco plus 531 boiler?
Vaillant Ecotech Plus 831 F22 fault?
vaillant ecoTEC plus boiler fault code - how to fix?
Vaillant Thermocompact Fault?
Valiant thermostat , BMU-Err ?
No hot water, intermittent when air temp drops?
Boiler over pressure on the hot-water side?
how to fix water pressure its down at bottom of grey part?
Advice?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?