how do I rectify the fault as detailed below?
Vaillant Ecotech Plus 831 F22 fault?
Valiant thermostat , BMU-Err ?
my boiler will no work?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
how to fix water pressure its down at bottom of grey part?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Advice?
Vaillant vcw gb242 eh central heating problem?