how do I rectify the fault as detailed below?
vaillant ecoTEC plus boiler fault code - how to fix?
Hot water comes and goes!?
Water dripping from opening at top of pump?
Vaillant eco plus 531 boiler?
Valiant thermostat , BMU-Err ?
Vaillant Ecotech Plus 831 F22 fault?
Hot water supply?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?