how do I rectify the fault as detailed below?
Hot water comes and goes!?
Vaillant 828E - no hot water?
Valliant Eco tec 28?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
Vaillant igniting issue ( domestic ) not CH?
Vaillant ecomax 828/2 e water pressure sensor?
Valiant thermostat , BMU-Err ?
Vailliant turbo max plus 824e?
Vaillant vcw gb242 eh central heating problem?
No hot water, intermittent when air temp drops?
Vaillant eco plus 531 boiler?
vaillant ecoTEC plus boiler fault code - how to fix?
Vaillant condensing boiler ecoTEC plus?
Vaillant ecotec 831 plus?
Advice?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Boiler over pressure on the hot-water side?
my vaillant boiler is saying a code com on it ?
Problem with the pressure in combi boiler?
Vaillant Ecotech Plus 831 F22 fault?