how do I rectify the fault as detailed below?
How many factors causes f22 fault?
my boiler will no work?
vaillant ecoTEC plus boiler fault code - how to fix?
Valiant thermostat , BMU-Err ?
Water dripping from opening at top of pump?
Vaillant 630 error f 85?
vaillant vcw gb 282gh?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Why is heating on at night?
Hot water comes and goes!?
my vaillant boiler is saying a code com on it ?