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Mend Vaillant 824 Ecotec Home Heating Systems

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Mend Vaillant 824 Ecotec

how to reset service hrs?

I want to know how to reset the service hr clock counters to zero after having my boiler serviced on a Vailiant 824 Ecotec model .
The service engineer don't know how to clear or reset it for the next due service hrs.

davey
October 2010
VaillantVaillant 824 EcotecHeating, Home Heating Systems
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Find out how to mend Vaillant 824 Ecotec home heating systems