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
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
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