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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
Heating, Home Heating Systems
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Greenstar 25 combo boiler?
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Worcester Bosch 532/i Combi Boiler?
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Worcester boiler dripping water?
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Boiler cycle?
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Remove boiler cover?
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How do I work my Storad storage heater?
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Siemens RDJ10RF thermostat problem?
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Advice?
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Fan tries to run every 15 seconds then stops immediately?
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British Gas 532/i Gas Combi Boiler?
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Vaillant ecotec 831 plus?
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Vaillant F22 fault?

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Mend Heating, Home Heating Systems

Worcester boiler dripping water?

Worcester boiler dripping water, can I just tight the screw? The icon next to the valve looks like radiators... [Read more]
Mend Heating, Home Heating Systems

Vaillant ecotec 831 plus?

Following a F22 fault where we had no heating and only cold water from the hot water tap, I topped up the syst... [Read more]
Mend Heating, Home Heating Systems

Remove boiler cover?

how can i remove the front cover of my ideal logic boiler?
Mend Heating, Home Heating Systems

Siemens RDJ10RF thermostat problem?

My temp is showing on the reciever alot higher than it actually is & each time I turn the temp up to get the h... [Read more]
Mend Heating, Home Heating Systems

Boiler cycle?

My boiler only fires up for about 90 seconds greenstar 4000
Mend Home Heating Systems
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