how do I rectify the fault as detailed below?
resetting thermostatat?
my vaillant boiler is saying a code com on it ?
Vaillant vcw gb242 eh central heating problem?
how to fix water pressure its down at bottom of grey part?
Advice?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
how do I vent the heat exchanger?
Vailliant turbo max plus 824e?
Vaillant Ecotech Plus 831 F22 fault?
No hot water, intermittent when air temp drops?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
Vaillant condensing boiler ecoTEC plus?
Vaillant igniting issue ( domestic ) not CH?
Why is heating on at night?