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Mend Sime Super 90 Plus Boiler Combi Diaphragm

super 90 plus will not light ?

i have just replaced the hot water bypass diaphram on my sime super 90 plus combi boiler which is activating ok mechanically but for both water and heating the boiler does not ignite, is there a reset button or a particular procedure to reset the boiler?
im freezing here please help asap

Anthony John
February 2009

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