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Mend Ferroli Optimax b B

Ferroli Band b Optimax Combi Boiler?

This may be a completely stupid question but i am, after all a mere female!
My heating won't come on, the boiler is not displaying any fault code and appears to fire up and temperature rise and then just displays "d" whilst i slowly freeze to death!
Any ideas, i cannot find anything in the manual.
Thanks
Emma

Emma Wade
December 2008
FerroliFerroli Optimax bHeating, Home Heating SystemsFerroli B Optimax
does the hot water work ok

b
December 2008

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