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Mend Vaillant ecoTEC plus Con Boiler System Hot

Con is flashing on my boiler system there is no hot water/heating?

vaillant-plus connection error display mainboard can someone help answer this question pls, no guess work pls

Thank u!

April Deans
January 2011
Vaillant ecoTEC plusHeating, Home Heating SystemsCon Boiler System Hot
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