How to mend Vaillant Vcwgb 242eh

my vaillant boiler is saying a code com on it ?

Vaillant ecomax 828/2 e water pressure sensor?

Hot water comes and goes!?

how do I rectify the fault as detailed below?

Advice?

Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?

how do I vent the heat exchanger?

my boiler will no work?

Vaillant F22 fault?

What does f.25 mean?

Vaillant vcw gb242 eh central heating problem?

Vaillant Ecotech Plus 831 F22 fault?

Vailliant turbo max plus 824e?

How do I fix f22 error on my Vaillent Ecotec Plus boiler?

Vaillant 828E - no hot water?

Vaillant condensing boiler ecoTEC plus?

Problem with the pressure in combi boiler?

can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?

vaillant ecoTEC plus boiler fault code - how to fix?

Vaillant ecotec plus 630?

Why is heating on at night?

Vaillant Thermocompact Fault?

Valliant Eco tec 28?

Boiler over pressure on the hot-water side?

Vaillant ecotec 831 plus?

how to fix water pressure its down at bottom of grey part?

Vaillant igniting issue ( domestic ) not CH?

No hot water, intermittent when air temp drops?

Vaillant eco plus 531 boiler?

Valiant thermostat , BMU-Err ?