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home Fix label Heating label_important Home Heating Systems category Vaillant

Valiant thermostat , BMU-Err ?

Vaillant thermostat and boiler with the error message on thermostat
What do I do?
Louise, November 2016
home Fix label Heating label_important Home Heating Systems category Vaillantdone
Water pressure in system too low, add water watching pressure indicator to achieve over 0.9bar.

Peter, January 2023
link Click here to see other fixes for Vaillant.

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