my vaillant boiler is saying a code com on it ?
how do I rectify the fault as detailed below?
Valliant Eco tec 28?
No hot water, intermittent when air temp drops?
Vaillant vcw gb242 eh central heating problem?
What does f.25 mean?
Vaillant ecotec plus 630?
How do I fix f22 error on my Vaillent Ecotec Plus boiler?
Hot water comes and goes!?
how to fix water pressure its down at bottom of grey part?
Valiant thermostat , BMU-Err ?
Vaillant Thermocompact Fault?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?
Vaillant Ecotech Plus 831 F22 fault?
Boiler over pressure on the hot-water side?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Vaillant 828E - no hot water?
Vaillant ecotec 831 plus?