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Mend Vaillant ecotec plus Ecotec Boiler Heating System

Bmu error?

Vaillant ecotec plus heating system displaying bmu error, tried the fix using taps to increase pressure however no joy....any ideas?

Robbo
March 2016
VaillantVaillant ecotec plusHeating, Home Heating SystemsVaillant Ecotec Boiler Heating System

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Vaillant BMU Error - Help & Fixes