my vaillant boiler is saying a code com on it ?
Hot water comes and goes!?
how do I rectify the fault as detailed below?
Valiant thermostat , BMU-Err ?
Vaillant condensing boiler ecoTEC plus?
how to fix water pressure its down at bottom of grey part?
Vaillant ecotec 831 plus?
No hot water, intermittent when air temp drops?
Vaillant vcw gb242 eh central heating problem?
Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Problem with the pressure in combi boiler?
can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?