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why does my boiler fire up on its own?

I have a worcester greenstar 28ijunior boiler and every so often it fires up on its own(ch not on, no hw demand) and runs for about 1 minute then stops, why is this?

tom staples
May 2009
Worcester GreenstarHeating, Home Heating SystemsBoiler Fire Fires
Probably its hot water pre-heat function.

Take a look and see if the "Eco" button is lit up. If not, press and hold for a few seconds then let go. When Eco is lit, the pre-heat is disabled.

Bunslinger
May 2009
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