how do I rectify the fault as detailed below?
Valiant thermostat , BMU-Err ?
Vaillant ecomax 828/2 e water pressure sensor?
Vaillant Ecotech Plus 831 F22 fault?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Boiler over pressure on the hot-water side?
vaillant ecoTEC plus boiler fault code - how to fix?
Hot water comes and goes!?
my boiler will no work?
how to fix water pressure its down at bottom of grey part?
Why is heating on at night?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Vaillant condensing boiler ecoTEC plus?
Vaillant F22 fault?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?