vent pipe shooting steam into header tank in loft

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Discuss vent pipe shooting steam into header tank in loft in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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jimadams

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we have a worcester bosch greenstar 24ri condensing boiler when the boiler fires up its ok but when it switches off during its cycle it vents steam and causes huge vibration in header tank in loft,could this be a faulty thermostat on boiler,i should add that i have turned the temperature control down to half and this has cured the problem but the boiler now runs all day and doesnt switch on and off automatically
 
Absolutely. You've something very wrong with the way it's been plumbed in.
 
Bet they havent wired the pump back to the boiler re over run, comon installer problem. When boiler cuts off on high no pump over run and they dont like it !!!
 
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