how do I rectify the fault as detailed below?
Valiant thermostat , BMU-Err ?
Why is heating on at night?
No hot water, intermittent when air temp drops?
Vaillant vcw gb242 eh central heating problem?
my vaillant boiler is saying a code com on it ?
Vaillant Thermocompact Fault?
Vaillant Ecotech Plus 831 F22 fault?
Water dripping from opening at top of pump?
vaillant vcw gb 282gh?
how to fix water pressure its down at bottom of grey part?
Vaillant ecotec 831 plus?