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Mend Vaillant 831 Boiler Tec Pressure

how can I fix my Vailant ecoTEC plus 831 boiler?

My eco TEC 831 is unable to maintain the pressure at 2 bars, it is 1 bar over and going into the red zone. Any solution please.

AL
December 2011

Vaillant Vaillant 831 Heating, Home Heating Systems Boiler Tec Pressure

The pressure vessel wants checking.. Pressure should be 0.75 bar empty not 2 bar !!!!

Steve
December 2011

Pressure vessel need recharge with cycle pump To 2bar with system drain out also look that by pass not blocked and pump need clean up

ltd
December 2011

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Vaillant ecoTEC 831 Boiler Pressure Fix