how do I rectify the fault as detailed below?
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?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant Ecotech Plus 831 F22 fault?
vaillant ecoTEC plus boiler fault code - how to fix?
Hot water comes and goes!?
Why is heating on at night?
Boiler over pressure on the hot-water side?
No hot water, intermittent when air temp drops?
Vaillant ecotec 831 plus?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
my vaillant boiler is saying a code com on it ?
Vaillant F22 fault?