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Loses pressure!?

When i switch my central heating off,my combi boiler(ferroli modena 102) loses pressure till its too low to operate system....Why is this?

Lee martin
May 2011
FerroliHeating, Home Heating SystemsPressure Central Heating Combi
possibly a leak on your system .or the expansion vessel on the boiler needs pumping up .and just see if the overflow /pressure relief valve isnt leaking .itll be copper most probably on the side of the wall

ex ferroli engineer
June 2011
it sound like you have a water leak on you heating some where, the best thing for you to do is put in some leak sealant in you rad, good luck

capitalboilers.co.uk
May 2011

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