how do I rectify the fault as detailed below?
Hot water comes and goes!?
Valiant thermostat , BMU-Err ?
resetting thermostatat?
how to fix water pressure its down at bottom of grey part?
Water dripping from opening at top of pump?
Vaillant ecotec plus 630?
Vaillant igniting issue ( domestic ) not CH?
No hot water, intermittent when air temp drops?
Vaillant 630 error f 85?
Vaillant eco plus 531 boiler?
Vaillant ecomax 828/2 e water pressure sensor?