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my boiler is a potterton profile 50E?

the flue fan cycles ON/OFF continually and boiler does'nt fire up.If i remove front case fan does NOT cycle but boiler still does NOT fire up
RICHARD CHILDS, February 2009
check pressure switch

gasman1uk, February 2009
i have just had this problem
pcb will probably need replacing
mine did and now works a treat
nice to have a warm house and a tank of hot water again
this has been the only time it stopped working not bad for a 20 year old boiler

chris, February 2009
Google 'Dodgy Old Boiler' and you may find relevent info therein.

John B, February 2009
link Click here to see other fixes for Potterton.