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home Fix label Heating label_important Home Heating Systems category Baxi

pressure drop in baxi 80e?

when i put the central heating on the pressure rises to above 3 bar so the overflow kicks in and i end up having to top it up again.there is no sign of any leaks the boiler is only 2 years old please can you help
andy
andrew williams, October 2007
home Fix label Heating label_important Home Heating Systems category Baxidone
it could be the expansion vessel is faulty

plumberontap, December 2009
yes i set it to 1 bar when i put the heating on there is an initial drop in pressure and then it slowly starts to rise i have bled all the radiators is it possible that there could be air in the boiler if so how do i bleed the boiler

andrew williams, October 2007
Are you overpressurising the boiler when you top it up - it should only be pressurised to 1 bar when system is cold. Make sure filling loop is completely closed and not passing water into system

PML, October 2007
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