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home Fix label Heating label_important Home Heating Systems category Vaillant

How can I fix my vaillant ecotec plus 831?

my boiler keeps discharging and losing pressure and shows F22 on the display. The system has been power flushed and is clear.
Simply Simon, January 2009
home Fix label Heating label_important Home Heating Systems category Vaillantdone
Could be the Pressure relief valve. It may have been used to drain the boiler, which is wrong. Or the expansion vessel has depressurised.

Gasser, February 2009
is water leaking out from the overflow outside?

Ben, January 2009
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