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Mend Vaillant ecoMAX Boiler Heating Fault

how to fix my valliant combi boiler?

i have a vailliant eco max combi boiler it gives us hot water no problem but when we turn the heating on it works for about 2mins then goes off and comes up with a fault saying pump over run has any body got any ideas plz

chris
September 2008
VaillantVaillant ecoMAXHeating, Home Heating SystemsBoiler Heating Fault
Is your heating circuit heating up ? if not then the diverter valve is not opening which will cause the overrun to activate as there is no circulation.

Engineer De Gaz
October 2008

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