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home Fix label Heating label_important Home Heating Systems category Vaillant

vaillant combi?

dhw is ok ch fires up for few seconds then goes off and continues this cycle on ch. only water in boiler is getting hot, pump is working fine.connot find mod no, does 806269gb mean anything?
bob, January 2008
home Fix label Heating label_important Home Heating Systems category Vaillantdone
Blockage in heating circuit
check flow and return valves below boiler

D, January 2008
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