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my vaillant boiler is saying a code com on it ?
Problem with the pressure in combi boiler?
Vaillant igniting issue ( domestic ) not CH?
Valiant thermostat , BMU-Err ?
Vaillant ecomax 828/2 e water pressure sensor?
No hot water, intermittent when air temp drops?
Vaillant condensing boiler ecoTEC plus?
Vaillant vcw gb242 eh central heating problem?
Hot water comes and goes!?
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vaillant ecoTEC plus boiler fault code - how to fix?