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Mend Worcester Bosch Greenstar Heating System Pressure Drop Boiler

why wont my greenstar maintain pressure.(2 year old system)?

pressure drops to zero daily when cold, needs topping up to 1 bar every day,when running shows 1.5 bar. what is wrong? is it detremental to running operation if left? what would be a ball park figure of repair costs? thanks...

Stevie P.
January 2009

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